137
FNUS55 KBYZ 232036
FWFBYZ
FIRE WEATHER PLANNING FORECAST FOR SCEN AND SERN MONTANA
NATIONAL WEATHER SERVICE BILLINGS MT
236 PM MDT SUN AUG 23 2026
..ELEVATED FIRE WEATHER CONDITIONS WEST OF BILLINGS TODAY
..BREEZY NW WINDS FOR THE FAR EAST MTZ132-133 MONDAY
DISCUSSION
A FRONTAL PASSAGE FROM THE WEST IS ANTICIPATED THIS AFTERNOON AND
EVENING BRINGING A PUSH OF WIND AND ISOLATED TO SCATTERED
THUNDERSTORMS. EXPECT ELEVATED FIRE WEATHER CONDITIONS,
ESPECIALLY FOR DISTRICTS WEST OF YELLOWSTONE COUNTY, WITH RH
READINGS DROPPING AS LOW AS 18-25 PERCENT FOR MOST LOCATIONS. A
FEW THUNDERSTORMS COULD BE STRONG TO SEVERE INTO THE EVENING HOURS
WITH STRONG WIND GUSTS OF 55-65 MPH THE MAIN THREAT. BRIEF HEAVY
RAIN IS ALSO POSSIBLE. COOLER AND DRIER CONDITIONS MOVE INTO THE
AREA MONDAY, THOUGH BREEZY NORTHWEST WINDS (15-30 MPH) CAN BE
EXPECTED ACROSS MTZ132-133 (CUSTER COUNTY AND SIOUX RD) WITH
AFTERNOON RH DOWN NEAR 20 PERCENT. CONDITIONS TREND SOMEWHAT
COOLER AND DRIER FOR THE WEEK AHEAD, WITH JUST AN OCCASIONAL
CHANCE OF PRECIPITATION. PALMQUIST
MTZ123-241030-
GALLATIN NATIONAL FOREST-
236 PM MDT SUN AUG 23 2026
TONIGHT
* SKY/WEATHER...........PARTLY CLOUDY. ISOLATED SHOWERS AND
THUNDERSTORMS IN THE EVENING. SOME THUNDERSTORMS COULD BE
SEVERE.
* MIN TEMPERATURE.......48-58 AT 5000 FEET...43-53 AT 7000 FEET.
* 24 HR TREND.........6 DEGREES COOLER.
* MAX HUMIDITY..........70-80 PERCENT AT 5000 FEET...68-78 PERCENT
AT 7000 FEET.
* 24 HR TREND.........24 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........SOUTHWEST WINDS 5 TO 15 MPH.
* RIDGETOP.............WEST 5 TO 15 MPH.
* CHANCE OF LIGHTNING...15 PERCENT.
* CWR...................10 PERCENT.
MONDAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......78-88 AT 5000 FEET...66-76 AT 7000 FEET.
* 24 HR TREND.........2 DEGREES COOLER.
* MIN HUMIDITY..........14-22 PERCENT AT 5000 FEET...17-26 PERCENT
AT 7000 FEET.
* 24 HR TREND.........7 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........SOUTH WINDS 5 TO 10 MPH IN THE MORNING
SHIFTING TO THE NORTHWEST IN THE AFTERNOON.
* RIDGETOP.............NORTHWEST 5 TO 15 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
MONDAY NIGHT
* SKY/WEATHER...........MOSTLY CLOUDY.
* MIN TEMPERATURE.......47-57 AT 5000 FEET...44-54 AT 7000 FEET.
* 24 HR TREND.........2 DEGREES WARMER.
* MAX HUMIDITY..........48-53 PERCENT.
* 24 HR TREND.........9 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........SOUTHEAST WINDS 5 TO 10 MPH.
* RIDGETOP.............SOUTHEAST 5 TO 10 MPH.
* CHANCE OF LIGHTNING...1 PERCENT.
* CWR...................ZERO.
TUESDAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......77-87 AT 5000 FEET...66-76 AT 7000 FEET.
* 24 HR TREND.........1 DEGREE WARMER.
* MIN HUMIDITY..........24-29 PERCENT.
* 24 HR TREND.........8 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........SOUTH WINDS 5 TO 10 MPH IN THE MORNING
SHIFTING TO THE NORTHWEST IN THE AFTERNOON.
* RIDGETOP.............NORTHWEST 5 TO 10 MPH.
* CHANCE OF LIGHTNING...14 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
TUESDAY NIGHT
MOSTLY CLOUDY. LOWS 49 TO 59. SOUTH WINDS 5 TO
10 MPH.
WEDNESDAY
MOSTLY CLOUDY. SCATTERED SHOWERS. LOWS 51 TO 61.
HIGHS 80 TO 89. SOUTHWEST WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS. LOWS 50 TO 60. HIGHS 81 TO 89. SOUTH WINDS 5 TO
10 MPH.
FRIDAY
PARTLY CLOUDY. ISOLATED SHOWERS. LOWS 49 TO 59. HIGHS
79 TO 87. SOUTHWEST WINDS 5 TO 10 MPH.
SATURDAY
PARTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS.
LOWS 46 TO 56. HIGHS 77 TO 85.
SUNDAY
MOSTLY SUNNY. HIGHS 73 TO 81.
MTZ124-241030-
WHEATLAND COUNTY/SWEET GRASS COUNTY-
236 PM MDT SUN AUG 23 2026
TONIGHT
* SKY/WEATHER...........MOSTLY CLEAR. ISOLATED SHOWERS AND
THUNDERSTORMS IN THE EVENING. SOME THUNDERSTORMS COULD BE
SEVERE.
* MIN TEMPERATURE.......51-56.
* 24 HR TREND.........7 DEGREES COOLER.
* MAX HUMIDITY..........59-64 PERCENT.
* 24 HR TREND.........29 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............NORTHWEST WINDS 10 TO 20 MPH. GUSTS UP TO 30
MPH IN THE EVENING.
* CHANCE OF LIGHTNING...16 PERCENT.
* CWR...................LESS THAN 10 PERCENT.
MONDAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......82-87.
* 24 HR TREND.........6 DEGREES COOLER.
* MIN HUMIDITY..........15-20 PERCENT.
* 24 HR TREND.........1 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............NORTHWEST WINDS 10 TO 20 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
MONDAY NIGHT
* SKY/WEATHER...........MOSTLY CLOUDY.
* MIN TEMPERATURE.......49-54.
* 24 HR TREND.........2 DEGREES COOLER.
* MAX HUMIDITY..........70-75 PERCENT.
* 24 HR TREND.........11 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............NORTHWEST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
TUESDAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......80-85.
* 24 HR TREND.........2 DEGREES COOLER.
* MIN HUMIDITY..........24-29 PERCENT.
* 24 HR TREND.........9 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............NORTHWEST WINDS 5 TO 10 MPH IN THE MORNING
SHIFTING TO THE EAST 5 TO 15 MPH IN THE AFTERNOON.
* CHANCE OF LIGHTNING...1 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
TUESDAY NIGHT
PARTLY CLOUDY. LOWS 50 TO 55. EAST WINDS 5 TO
10 MPH.
WEDNESDAY
MOSTLY CLOUDY. ISOLATED SHOWERS. LOWS 53 TO 58.
HIGHS 84 TO 89. SOUTHEAST WINDS 5 TO 10 MPH.
THURSDAY
PARTLY CLOUDY. ISOLATED SHOWERS. LOWS 53 TO 58. HIGHS
88 TO 93. WEST WINDS 5 TO 15 MPH.
FRIDAY
PARTLY CLOUDY. LOWS 51 TO 56. HIGHS 85 TO 90. WEST
WINDS 5 TO 15 MPH.
SATURDAY
PARTLY CLOUDY. ISOLATED SHOWERS. LOWS 49 TO 54. HIGHS
83 TO 88.
SUNDAY
SUNNY. HIGHS 77 TO 82.
MTZ125-241030-
STILLWATER COUNTY-
236 PM MDT SUN AUG 23 2026
TONIGHT
* SKY/WEATHER...........MOSTLY CLOUDY WITH SCATTERED RAIN SHOWERS
AND ISOLATED THUNDERSTORMS IN THE EVENING, THEN MOSTLY CLEAR
OVERNIGHT. SOME THUNDERSTORMS COULD BE SEVERE.
* MIN TEMPERATURE.......56-61.
* 24 HR TREND.........2 DEGREES COOLER.
* MAX HUMIDITY..........59-64 PERCENT.
* 24 HR TREND.........26 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............WEST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...17 PERCENT.
* CWR...................10 PERCENT.
MONDAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......83-88.
* 24 HR TREND.........7 DEGREES COOLER.
* MIN HUMIDITY..........18-23 PERCENT.
* 24 HR TREND.........1 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............SOUTHEAST WINDS 5 TO 10 MPH IN THE MORNING
SHIFTING TO THE NORTHEAST IN THE AFTERNOON.
* CHANCE OF LIGHTNING...1 PERCENT.
* CWR...................ZERO.
MONDAY NIGHT
* SKY/WEATHER...........MOSTLY CLOUDY.
* MIN TEMPERATURE.......54-59.
* 24 HR TREND.........2 DEGREES COOLER.
* MAX HUMIDITY..........49-54 PERCENT.
* 24 HR TREND.........10 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............WEST WINDS 5 TO 10 MPH.
* CHANCE OF LIGHTNING...1 PERCENT.
* CWR...................ZERO.
TUESDAY
* SKY/WEATHER...........MOSTLY SUNNY. SCATTERED RAIN SHOWERS AND
ISOLATED THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.......80-85.
* 24 HR TREND.........3 DEGREES COOLER.
* MIN HUMIDITY..........26-31 PERCENT.
* 24 HR TREND.........8 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............EAST WINDS 5 TO 10 MPH.
* CHANCE OF LIGHTNING...20 PERCENT.
* CWR...................10 PERCENT.
FORECAST DAYS 3 THROUGH 7...
TUESDAY NIGHT
PARTLY CLOUDY. LOWS 54 TO 59. SOUTH WINDS 5 TO
10 MPH.
WEDNESDAY
MOSTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS.
LOWS 56 TO 61. HIGHS 85 TO 90. SOUTH WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS. LOWS 56 TO 61. HIGHS 88 TO 93. SOUTHWEST WINDS
5 TO 10 MPH.
FRIDAY
PARTLY CLOUDY. ISOLATED SHOWERS. LOWS 55 TO 60. HIGHS
85 TO 90. WEST WINDS 5 TO 10 MPH.
SATURDAY
PARTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS.
LOWS 53 TO 58. HIGHS 84 TO 89.
SUNDAY
MOSTLY SUNNY. ISOLATED SHOWERS AND THUNDERSTORMS. HIGHS
78 TO 83.
MTZ126-241030-
BEARTOOTH RANGER DISTRICT CUSTER NATIONAL FOREST-
236 PM MDT SUN AUG 23 2026
TONIGHT
* SKY/WEATHER...........PARTLY CLOUDY. SCATTERED RAIN SHOWERS AND
ISOLATED THUNDERSTORMS IN THE EVENING. SOME THUNDERSTORMS COULD
BE SEVERE.
* MIN TEMPERATURE.......57-64 AT 5000 FEET...48-58 AT 7000 FEET.
* 24 HR TREND.........5 DEGREES COOLER.
* MAX HUMIDITY..........53-58 PERCENT.
* 24 HR TREND.........17 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........WEST WINDS 5 TO 15 MPH.
* RIDGETOP.............WEST 10 TO 20 MPH.
* CHANCE OF LIGHTNING...15 PERCENT.
* CWR...................10 PERCENT.
MONDAY
* SKY/WEATHER...........MOSTLY SUNNY.
* MAX TEMPERATURE.......77-85 AT 5000 FEET...69-79 AT 7000 FEET.
* 24 HR TREND.........5 DEGREES COOLER.
* MIN HUMIDITY..........28-33 PERCENT.
* 24 HR TREND.........2 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTH WINDS 5 TO 15 MPH.
* RIDGETOP.............NORTHEAST 5 TO 15 MPH.
* CHANCE OF LIGHTNING...2 PERCENT.
* CWR...................ZERO.
MONDAY NIGHT
* SKY/WEATHER...........MOSTLY CLOUDY.
* MIN TEMPERATURE.......55-61 AT 5000 FEET...47-57 AT 7000 FEET.
* 24 HR TREND.........UNCHANGED.
* MAX HUMIDITY..........45-55 PERCENT AT 5000 FEET...49-59 PERCENT
AT 7000 FEET.
* 24 HR TREND.........5 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........WEST WINDS 5 TO 10 MPH.
* RIDGETOP.............WEST 5 TO 10 MPH.
* CHANCE OF LIGHTNING...2 PERCENT.
* CWR...................ZERO.
TUESDAY
* SKY/WEATHER...........MOSTLY SUNNY IN THE MORNING, THEN MOSTLY
CLOUDY WITH SCATTERED SHOWERS AND THUNDERSTORMS IN THE
AFTERNOON.
* MAX TEMPERATURE.......76-83 AT 5000 FEET...66-76 AT 7000 FEET.
* 24 HR TREND.........3 DEGREES COOLER.
* MIN HUMIDITY..........26-36 PERCENT AT 5000 FEET...31-41 PERCENT
AT 7000 FEET.
* 24 HR TREND.........10 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTHWEST WINDS 5 TO 10 MPH IN THE MORNING
SHIFTING TO THE NORTHEAST IN THE AFTERNOON.
* RIDGETOP.............NORTHEAST 5 TO 15 MPH.
* CHANCE OF LIGHTNING...26 PERCENT.
* CWR...................30 PERCENT.
FORECAST DAYS 3 THROUGH 7...
TUESDAY NIGHT
PARTLY CLOUDY. ISOLATED SHOWERS. LOWS 55 TO 61.
WEST WINDS 5 TO 10 MPH.
WEDNESDAY
MOSTLY CLOUDY. SCATTERED SHOWERS AND THUNDERSTORMS.
LOWS 56 TO 64. HIGHS 79 TO 87. SOUTHWEST WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS. LOWS 57 TO 64. HIGHS 81 TO 90. SOUTHWEST WINDS
5 TO 15 MPH.
FRIDAY
PARTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS. LOWS
56 TO 63. HIGHS 79 TO 87. WEST WINDS 5 TO 15 MPH.
SATURDAY
PARTLY CLOUDY. ISOLATED SHOWERS. LOWS 54 TO 60. HIGHS
77 TO 86.
SUNDAY
MOSTLY SUNNY. ISOLATED SHOWERS AND THUNDERSTORMS. HIGHS
73 TO 81.
MTZ127-241030-
GOLDEN VALLEY COUNTY/MUSSELSHELL COUNTY-
236 PM MDT SUN AUG 23 2026
TONIGHT
* SKY/WEATHER...........PARTLY CLOUDY. SCATTERED RAIN SHOWERS AND
ISOLATED THUNDERSTORMS IN THE EVENING. SOME THUNDERSTORMS COULD
BE SEVERE.
* MIN TEMPERATURE.......60-65.
* 24 HR TREND.........5 DEGREES COOLER.
* MAX HUMIDITY..........54-59 PERCENT.
* 24 HR TREND.........5 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............WEST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...20 PERCENT.
* CWR...................10 PERCENT.
MONDAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......79-84.
* 24 HR TREND.........9 DEGREES COOLER.
* MIN HUMIDITY..........17-22 PERCENT.
* 24 HR TREND.........2 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............NORTHWEST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...1 PERCENT.
* CWR...................ZERO.
MONDAY NIGHT
* SKY/WEATHER...........MOSTLY CLOUDY.
* MIN TEMPERATURE.......56-61.
* 24 HR TREND.........4 DEGREES COOLER.
* MAX HUMIDITY..........49-54 PERCENT.
* 24 HR TREND.........5 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............NORTH WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
TUESDAY
* SKY/WEATHER...........MOSTLY SUNNY.
* MAX TEMPERATURE.......77-82.
* 24 HR TREND.........2 DEGREES COOLER.
* MIN HUMIDITY..........27-32 PERCENT.
* 24 HR TREND.........10 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............NORTHEAST WINDS 5 TO 10 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
TUESDAY NIGHT
PARTLY CLOUDY. LOWS 57 TO 62. EAST WINDS 5 TO
15 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 61 TO 66. HIGHS 82 TO 87. EAST
WINDS 5 TO 15 MPH.
THURSDAY
MOSTLY CLOUDY. SCATTERED SHOWERS. LOWS 62 TO 67.
HIGHS 86 TO 91. SOUTHWEST WINDS 5 TO 10 MPH.
FRIDAY
PARTLY CLOUDY. ISOLATED SHOWERS. LOWS 59 TO 64. HIGHS
82 TO 87. NORTH WINDS 5 TO 15 MPH.
SATURDAY
PARTLY CLOUDY. ISOLATED SHOWERS. LOWS 56 TO 61. HIGHS
81 TO 86.
SUNDAY
MOSTLY SUNNY. HIGHS 74 TO 79.
MTZ128-241030-
YELLOWSTONE COUNTY-
236 PM MDT SUN AUG 23 2026
TONIGHT
* SKY/WEATHER...........PARTLY CLOUDY. SCATTERED RAIN SHOWERS AND
ISOLATED THUNDERSTORMS IN THE EVENING. SOME THUNDERSTORMS COULD
BE SEVERE.
* MIN TEMPERATURE.......60-65.
* 24 HR TREND.........1 DEGREE COOLER.
* MAX HUMIDITY..........61-66 PERCENT.
* 24 HR TREND.........24 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............WEST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...20 PERCENT.
* CWR...................10 PERCENT.
MONDAY
* SKY/WEATHER...........MOSTLY SUNNY.
* MAX TEMPERATURE.......86-91.
* 24 HR TREND.........7 DEGREES COOLER.
* MIN HUMIDITY..........16-21 PERCENT.
* 24 HR TREND.........1 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............WEST WINDS 5 TO 10 MPH IN THE MORNING
SHIFTING TO THE NORTH IN THE AFTERNOON.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
MONDAY NIGHT
* SKY/WEATHER...........MOSTLY CLOUDY.
* MIN TEMPERATURE.......58-63.
* 24 HR TREND.........2 DEGREES COOLER.
* MAX HUMIDITY..........55-60 PERCENT.
* 24 HR TREND.........6 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............NORTH WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
TUESDAY
* SKY/WEATHER...........MOSTLY SUNNY.
* MAX TEMPERATURE.......83-88.
* 24 HR TREND.........3 DEGREES COOLER.
* MIN HUMIDITY..........23-28 PERCENT.
* 24 HR TREND.........7 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............NORTHEAST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
TUESDAY NIGHT
PARTLY CLOUDY. LOWS 59 TO 64. EAST WINDS 5 TO
15 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 61 TO 66. HIGHS 88 TO 93. EAST
WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY CLOUDY. SCATTERED SHOWERS. LOWS 62 TO 67.
HIGHS 91 TO 96. SOUTHWEST WINDS 5 TO 10 MPH.
FRIDAY
MOSTLY CLOUDY. ISOLATED SHOWERS. LOWS 60 TO 65. HIGHS
88 TO 93. NORTHWEST WINDS 5 TO 10 MPH.
SATURDAY
PARTLY CLOUDY. ISOLATED SHOWERS. LOWS 58 TO 63. HIGHS
87 TO 92.
SUNDAY
MOSTLY SUNNY. HIGHS 81 TO 86.
MTZ129-241030-
CROW INDIAN RESERVATION/BIGHORN CANYON REC AREA-
236 PM MDT SUN AUG 23 2026
TONIGHT
* SKY/WEATHER...........PARTLY CLOUDY. SCATTERED RAIN SHOWERS AND
ISOLATED THUNDERSTORMS IN THE EVENING. SOME THUNDERSTORMS COULD
BE SEVERE.
* MIN TEMPERATURE.......56-63 AT 5000 FEET...54-59 AT 7000 FEET.
* 24 HR TREND.........4 DEGREES COOLER.
* MAX HUMIDITY..........57-67 PERCENT AT 5000 FEET...56-63 PERCENT
AT 7000 FEET.
* 24 HR TREND.........2 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........WEST WINDS 5 TO 15 MPH.
* RIDGETOP.............SOUTHWEST 5 TO 15 MPH.
* CHANCE OF LIGHTNING...19 PERCENT.
* CWR...................20 PERCENT.
MONDAY
* SKY/WEATHER...........MOSTLY SUNNY.
* MAX TEMPERATURE.......76-86 AT 5000 FEET...69-76 AT 7000 FEET.
* 24 HR TREND.........7 DEGREES COOLER.
* MIN HUMIDITY..........19-28 PERCENT AT 5000 FEET...26-32 PERCENT
AT 7000 FEET.
* 24 HR TREND.........UNCHANGED.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTHWEST WINDS 5 TO 15 MPH.
* RIDGETOP.............NORTHWEST 5 TO 15 MPH.
* CHANCE OF LIGHTNING...1 PERCENT.
* CWR...................ZERO.
MONDAY NIGHT
* SKY/WEATHER...........MOSTLY CLOUDY.
* MIN TEMPERATURE.......56-61 AT 5000 FEET...52-57 AT 7000 FEET.
* 24 HR TREND.........4 DEGREES COOLER.
* MAX HUMIDITY..........45-55 PERCENT AT 5000 FEET...43-53 PERCENT
AT 7000 FEET.
* 24 HR TREND.........18 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTHEAST WINDS 5 TO 10 MPH.
* RIDGETOP.............EAST 5 TO 10 MPH.
* CHANCE OF LIGHTNING...1 PERCENT.
* CWR...................ZERO.
TUESDAY
* SKY/WEATHER...........PARTLY SUNNY IN THE MORNING THEN CLEARING.
* MAX TEMPERATURE.......74-84 AT 5000 FEET...67-74 AT 7000 FEET.
* 24 HR TREND.........1 DEGREE COOLER.
* MIN HUMIDITY..........22-32 PERCENT AT 5000 FEET...31-38 PERCENT
AT 7000 FEET.
* 24 HR TREND.........5 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTH WINDS 5 TO 10 MPH.
* RIDGETOP.............NORTH 5 TO 15 MPH.
* CHANCE OF LIGHTNING...2 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
TUESDAY NIGHT
MOSTLY CLEAR. LOWS 56 TO 61. EAST WINDS 5 TO
10 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 59 TO 65. HIGHS 78 TO 88.
SOUTHEAST WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY CLOUDY. ISOLATED SHOWERS. LOWS 60 TO 65. HIGHS
82 TO 92. SOUTH WINDS 5 TO 10 MPH.
FRIDAY
MOSTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS. LOWS
58 TO 63. HIGHS 79 TO 89. NORTH WINDS 5 TO 10 MPH.
SATURDAY
PARTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS.
LOWS 56 TO 61. HIGHS 78 TO 88.
SUNDAY
MOSTLY SUNNY. HIGHS 72 TO 82.
MTZ130-241030-
NORTHERN ROSEBUD/NORTHERN TREASURE COUNTIES-
236 PM MDT SUN AUG 23 2026
TONIGHT
* SKY/WEATHER...........PARTLY CLOUDY. SCATTERED RAIN SHOWERS AND
ISOLATED THUNDERSTORMS IN THE EVENING. SOME THUNDERSTORMS COULD
BE SEVERE.
* MIN TEMPERATURE.......60-65.
* 24 HR TREND.........6 DEGREES COOLER.
* MAX HUMIDITY..........69-74 PERCENT.
* 24 HR TREND.........7 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............WEST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...21 PERCENT.
* CWR...................10 PERCENT.
MONDAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......84-89.
* 24 HR TREND.........11 DEGREES COOLER.
* MIN HUMIDITY..........18-23 PERCENT.
* 24 HR TREND.........2 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............NORTHWEST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
MONDAY NIGHT
* SKY/WEATHER...........PARTLY CLOUDY.
* MIN TEMPERATURE.......56-61.
* 24 HR TREND.........4 DEGREES COOLER.
* MAX HUMIDITY..........66-71 PERCENT.
* 24 HR TREND.........3 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............NORTHWEST WINDS 5 TO 10 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
TUESDAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......84-89.
* 24 HR TREND.........UNCHANGED.
* MIN HUMIDITY..........23-28 PERCENT.
* 24 HR TREND.........5 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............NORTHWEST WINDS 5 TO 10 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
TUESDAY NIGHT
MOSTLY CLEAR. LOWS 55 TO 60. NORTHEAST WINDS
5 TO 10 MPH.
WEDNESDAY
MOSTLY CLEAR. LOWS 60 TO 65. HIGHS 87 TO 92. EAST
WINDS 5 TO 10 MPH.
THURSDAY
PARTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS.
LOWS 62 TO 67. HIGHS 92 TO 97. SOUTHEAST WINDS 5 TO 10 MPH.
FRIDAY
PARTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS. LOWS
59 TO 64. HIGHS 89 TO 94. NORTH WINDS 5 TO 10 MPH.
SATURDAY
PARTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS.
LOWS 57 TO 62. HIGHS 87 TO 92.
SUNDAY
MOSTLY SUNNY. HIGHS 82 TO 87.
MTZ131-241030-
NORTHERN CHEYENNE INDIAN RESERVATION/ASHLAND RANGER DISTRICT
CUSTER NATL FOREST-
236 PM MDT SUN AUG 23 2026
TONIGHT
* SKY/WEATHER...........PARTLY CLOUDY. SCATTERED RAIN SHOWERS AND
ISOLATED THUNDERSTORMS IN THE EVENING, THEN ISOLATED RAIN
SHOWERS OVERNIGHT. SOME THUNDERSTORMS COULD BE SEVERE.
* MIN TEMPERATURE.......56-61.
* 24 HR TREND.........7 DEGREES COOLER.
* MAX HUMIDITY..........69-74 PERCENT.
* 24 HR TREND.........19 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........WEST WINDS 5 TO 15 MPH.
* RIDGETOP.............WEST 5 TO 15 MPH.
* CHANCE OF LIGHTNING...20 PERCENT.
* CWR...................20 PERCENT.
MONDAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......84-89.
* 24 HR TREND.........8 DEGREES COOLER.
* MIN HUMIDITY..........18-23 PERCENT.
* 24 HR TREND.........1 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTH WINDS 5 TO 15 MPH.
* RIDGETOP.............NORTH 5 TO 15 MPH.
* CHANCE OF LIGHTNING...1 PERCENT.
* CWR...................ZERO.
MONDAY NIGHT
* SKY/WEATHER...........PARTLY CLOUDY.
* MIN TEMPERATURE.......54-59.
* 24 HR TREND.........2 DEGREES COOLER.
* MAX HUMIDITY..........53-58 PERCENT.
* 24 HR TREND.........16 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTH WINDS 5 TO 10 MPH.
* RIDGETOP.............NORTH 5 TO 10 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
TUESDAY
* SKY/WEATHER...........MOSTLY SUNNY.
* MAX TEMPERATURE.......83-88.
* 24 HR TREND.........1 DEGREE COOLER.
* MIN HUMIDITY..........20-25 PERCENT.
* 24 HR TREND.........2 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTH WINDS 5 TO 10 MPH.
* RIDGETOP.............NORTH 5 TO 15 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
TUESDAY NIGHT
MOSTLY CLEAR. LOWS 53 TO 58. NORTHEAST WINDS
5 TO 10 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 58 TO 63. HIGHS 87 TO 92.
SOUTHEAST WINDS 5 TO 10 MPH.
THURSDAY
PARTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS.
LOWS 59 TO 64. HIGHS 91 TO 96. SOUTHEAST WINDS 5 TO 10 MPH.
FRIDAY
MOSTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS. LOWS
57 TO 62. HIGHS 89 TO 94. NORTHEAST WINDS 5 TO 10 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 55 TO 60. HIGHS 88 TO 93.
SUNDAY
MOSTLY SUNNY. HIGHS 83 TO 88.
MTZ132-241030-
CUSTER COUNTY-
236 PM MDT SUN AUG 23 2026
TONIGHT
* SKY/WEATHER...........PARTLY CLOUDY. ISOLATED SHOWERS AND
THUNDERSTORMS. SOME THUNDERSTORMS MAY PRODUCE GUSTY WINDS IN THE
EVENING.
* MIN TEMPERATURE.......63-68.
* 24 HR TREND.........2 DEGREES COOLER.
* MAX HUMIDITY..........68-73 PERCENT.
* 24 HR TREND.........7 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............WEST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...20 PERCENT.
* CWR...................LESS THAN 10 PERCENT.
MONDAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......83-88.
* 24 HR TREND.........8 DEGREES COOLER.
* MIN HUMIDITY..........18-23 PERCENT.
* 24 HR TREND.........7 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............NORTHWEST WINDS 10 TO 20 MPH.
* CHANCE OF LIGHTNING...1 PERCENT.
* CWR...................ZERO.
MONDAY NIGHT
* SKY/WEATHER...........PARTLY CLOUDY.
* MIN TEMPERATURE.......56-61.
* 24 HR TREND.........7 DEGREES COOLER.
* MAX HUMIDITY..........61-66 PERCENT.
* 24 HR TREND.........7 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............NORTHWEST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
TUESDAY
* SKY/WEATHER...........MOSTLY SUNNY.
* MAX TEMPERATURE.......81-86.
* 24 HR TREND.........2 DEGREES COOLER.
* MIN HUMIDITY..........27-32 PERCENT.
* 24 HR TREND.........9 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............NORTHWEST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
TUESDAY NIGHT
MOSTLY CLEAR. LOWS 53 TO 58. NORTH WINDS 5 TO
15 MPH.
WEDNESDAY
MOSTLY CLEAR. LOWS 58 TO 63. HIGHS 82 TO 87. EAST
WINDS 5 TO 10 MPH.
THURSDAY
PARTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS. LOWS 61 TO 66. HIGHS 88 TO 93. SOUTHEAST WINDS
5 TO 15 MPH.
FRIDAY
PARTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS. LOWS
59 TO 64. HIGHS 87 TO 92. SOUTHEAST WINDS 5 TO 10 MPH.
SATURDAY
PARTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS.
LOWS 57 TO 62. HIGHS 85 TO 90.
SUNDAY
MOSTLY SUNNY. HIGHS 81 TO 86.
MTZ133-241030-
SIOUX RANGER DISTRICT CUSTER NATIONAL FOREST-
236 PM MDT SUN AUG 23 2026
TONIGHT
* SKY/WEATHER...........PARTLY CLOUDY. ISOLATED SHOWERS AND
THUNDERSTORMS. SOME THUNDERSTORMS MAY PRODUCE GUSTY WINDS IN THE
EVENING.
* MIN TEMPERATURE.......61-66.
* 24 HR TREND.........1 DEGREE COOLER.
* MAX HUMIDITY..........76-81 PERCENT.
* 24 HR TREND.........5 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............EAST WINDS 5 TO 15 MPH IN THE EVENING
SHIFTING TO THE SOUTH OVERNIGHT.
* CHANCE OF LIGHTNING...16 PERCENT.
* CWR...................10 PERCENT.
MONDAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......87-92.
* 24 HR TREND.........3 DEGREES COOLER.
* MIN HUMIDITY..........19-24 PERCENT.
* 24 HR TREND.........8 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............NORTHWEST WINDS 10 TO 20 MPH. GUSTS UP TO
25 MPH IN THE AFTERNOON.
* CHANCE OF LIGHTNING...2 PERCENT.
* CWR...................ZERO.
MONDAY NIGHT
* SKY/WEATHER...........PARTLY CLOUDY.
* MIN TEMPERATURE.......56-61.
* 24 HR TREND.........5 DEGREES COOLER.
* MAX HUMIDITY..........55-60 PERCENT.
* 24 HR TREND.........21 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............NORTHWEST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
TUESDAY
* SKY/WEATHER...........MOSTLY SUNNY.
* MAX TEMPERATURE.......84-89.
* 24 HR TREND.........3 DEGREES COOLER.
* MIN HUMIDITY..........25-30 PERCENT.
* 24 HR TREND.........6 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............NORTHWEST WINDS 10 TO 20 MPH. GUSTS UP TO
25 MPH IN THE AFTERNOON.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
TUESDAY NIGHT
MOSTLY CLEAR. LOWS 54 TO 59. NORTHWEST WINDS
5 TO 15 MPH.
WEDNESDAY
MOSTLY CLEAR. LOWS 56 TO 61. HIGHS 84 TO 89.
NORTHEAST WINDS 5 TO 10 MPH.
THURSDAY
PARTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS.
LOWS 59 TO 64. HIGHS 87 TO 92. SOUTHEAST WINDS 5 TO 15 MPH.
FRIDAY
PARTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS. LOWS
57 TO 62. HIGHS 89 TO 94. SOUTHEAST WINDS 5 TO 15 MPH.
SATURDAY
PARTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS. LOWS 57 TO 62. HIGHS 87 TO 92.
SUNDAY
MOSTLY SUNNY. HIGHS 84 TO 89.
WYZ274-241030-
SHERIDAN COUNTY-
236 PM MDT SUN AUG 23 2026
TONIGHT
* SKY/WEATHER...........PARTLY CLOUDY. SCATTERED RAIN SHOWERS AND
ISOLATED THUNDERSTORMS IN THE EVENING. SOME THUNDERSTORMS MAY
PRODUCE GUSTY WINDS IN THE EVENING.
* MIN TEMPERATURE.......55-60.
* 24 HR TREND.........2 DEGREES COOLER.
* MAX HUMIDITY..........73-78 PERCENT.
* 24 HR TREND.........8 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........SOUTHWEST WINDS 5 TO 15 MPH.
* RIDGETOP.............SOUTHWEST 5 TO 15 MPH.
* CHANCE OF LIGHTNING...19 PERCENT.
* CWR...................10 PERCENT.
MONDAY
* SKY/WEATHER...........MOSTLY SUNNY.
* MAX TEMPERATURE.......85-90.
* 24 HR TREND.........5 DEGREES COOLER.
* MIN HUMIDITY..........22-27 PERCENT.
* 24 HR TREND.........2 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTH WINDS 5 TO 10 MPH.
* RIDGETOP.............NORTH 5 TO 15 MPH.
* CHANCE OF LIGHTNING...2 PERCENT.
* CWR...................ZERO.
MONDAY NIGHT
* SKY/WEATHER...........MOSTLY CLOUDY.
* MIN TEMPERATURE.......52-57.
* 24 HR TREND.........3 DEGREES COOLER.
* MAX HUMIDITY..........69-74 PERCENT.
* 24 HR TREND.........4 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTHWEST WINDS 5 TO 10 MPH.
* RIDGETOP.............NORTH 5 TO 10 MPH.
* CHANCE OF LIGHTNING...3 PERCENT.
* CWR...................ZERO.
TUESDAY
* SKY/WEATHER...........PARTLY SUNNY. ISOLATED SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.......82-87.
* 24 HR TREND.........3 DEGREES COOLER.
* MIN HUMIDITY..........24-29 PERCENT.
* 24 HR TREND.........2 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........LIGHT WINDS IN THE MORNING BECOMING NORTH 5
TO 10 MPH IN THE AFTERNOON.
* RIDGETOP.............NORTH 5 TO 10 MPH.
* CHANCE OF LIGHTNING...19 PERCENT.
* CWR...................LESS THAN 10 PERCENT.
FORECAST DAYS 3 THROUGH 7...
TUESDAY NIGHT
MOSTLY CLEAR. LOWS 50 TO 55. LIGHT WINDS.
WEDNESDAY
PARTLY CLOUDY. LOWS 53 TO 58. HIGHS 86 TO 91.
SOUTHEAST WINDS 5 TO 10 MPH.
THURSDAY
PARTLY CLOUDY. LOWS 55 TO 60. HIGHS 89 TO 94. WEST
WINDS 5 TO 10 MPH.
FRIDAY
PARTLY CLOUDY. ISOLATED SHOWERS. LOWS 53 TO 58. HIGHS
87 TO 92. WEST WINDS 5 TO 10 MPH.
SATURDAY
PARTLY CLOUDY. LOWS 52 TO 57. HIGHS 86 TO 91.
SUNDAY
MOSTLY SUNNY. HIGHS 82 TO 87.
WYZ284-241030-
BIGHORN NATIONAL FOREST-
236 PM MDT SUN AUG 23 2026
TONIGHT
* SKY/WEATHER...........PARTLY CLOUDY. SCATTERED RAIN SHOWERS AND
ISOLATED THUNDERSTORMS IN THE EVENING. SOME THUNDERSTORMS MAY
PRODUCE GUSTY WINDS IN THE EVENING.
* MIN TEMPERATURE.......45-50.
* 24 HR TREND.........5 DEGREES COOLER.
* MAX HUMIDITY..........79-84 PERCENT.
* 24 HR TREND.........4 PERCENT WETTER.
* WIND (20 FT)
* AT BURGESS JCT.......SOUTHWEST WINDS 10 TO 20 MPH.
* CHANCE OF LIGHTNING...18 PERCENT.
* CWR...................10 PERCENT.
MONDAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......69-74.
* 24 HR TREND.........3 DEGREES COOLER.
* MIN HUMIDITY..........23-28 PERCENT.
* 24 HR TREND.........3 PERCENT DRIER.
* WIND (20 FT)
* AT BURGESS JCT.......WEST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...3 PERCENT.
* CWR...................ZERO.
MONDAY NIGHT
* SKY/WEATHER...........MOSTLY CLOUDY.
* MIN TEMPERATURE.......43-48.
* 24 HR TREND.........2 DEGREES COOLER.
* MAX HUMIDITY..........74-79 PERCENT.
* 24 HR TREND.........5 PERCENT DRIER.
* WIND (20 FT)
* AT BURGESS JCT.......SOUTHEAST WINDS 5 TO 10 MPH IN THE EVENING
SHIFTING TO THE SOUTHWEST OVERNIGHT.
* CHANCE OF LIGHTNING...4 PERCENT.
* CWR...................ZERO.
TUESDAY
* SKY/WEATHER...........PARTLY SUNNY. SCATTERED RAIN SHOWERS AND
ISOLATED THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.......66-71.
* 24 HR TREND.........3 DEGREES COOLER.
* MIN HUMIDITY..........32-37 PERCENT.
* 24 HR TREND.........9 PERCENT WETTER.
* WIND (20 FT)
* AT BURGESS JCT.......WEST WINDS 5 TO 10 MPH IN THE MORNING
SHIFTING TO THE NORTH 5 TO 15 MPH IN THE AFTERNOON.
* CHANCE OF LIGHTNING...20 PERCENT.
* CWR...................10 PERCENT.
FORECAST DAYS 3 THROUGH 7...
TUESDAY NIGHT
PARTLY CLOUDY. LOWS 42 TO 47. SOUTHWEST WINDS
5 TO 10 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 44 TO 49. HIGHS 68 TO 73.
SOUTHWEST WINDS 5 TO 10 MPH.
THURSDAY
PARTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS.
LOWS 46 TO 51. HIGHS 71 TO 76. SOUTHWEST WINDS 5 TO 15 MPH.
FRIDAY
PARTLY CLOUDY. ISOLATED SHOWERS. LOWS 44 TO 49. HIGHS
70 TO 75. SOUTHWEST WINDS 5 TO 15 MPH.
SATURDAY
PARTLY CLOUDY. ISOLATED SHOWERS. LOWS 43 TO 48. HIGHS
68 TO 73.
SUNDAY
MOSTLY SUNNY. ISOLATED SHOWERS AND THUNDERSTORMS. HIGHS
64 TO 69.
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