895
FNUS55 KBYZ 261902
FWFBYZ
FIRE WEATHER PLANNING FORECAST FOR SCEN AND SERN MONTANA
NATIONAL WEATHER SERVICE BILLINGS MT
102 PM MDT SAT SEP 26 2026
DISCUSSION
CONDITIONS WILL BE CALM AND SEASONABLE TODAY WITH INCREASING
CHANCES FOR SHOWERS INTO SUNDAY, BUT CWRS WILL BE LOW DURING THE
DAY. INTO THE EVENING AND OVERNIGHT HOURS, ISOLATED SHOWERS AND
THUNDERSTORMS ARE EXPECTED MAINLY FOR SOUTHEAST MT AND NW SD.
LOCALLY HEAVY RAIN IS POSSIBLE UNDER ANY STRONGER THUNDERSTORMS AS
WELL AS SMALL HAIL AND GUSTY WINDS. AS WESTERLY FLOW BUILDS IN
ALOFT TUESDAY THROUGH THURSDAY, DRYER (MIN RHS 20-30%) AND BREEZY
CONDITIONS WILL PERSIST. TS
MTZ123-271030-
GALLATIN NATIONAL FOREST-
102 PM MDT SAT SEP 26 2026
TONIGHT
* SKY/WEATHER...........MOSTLY CLOUDY.
* MIN TEMPERATURE.......34-44 AT 5000 FEET...32-42 AT 7000 FEET.
* 24 HR TREND.........UNCHANGED.
* MAX HUMIDITY..........52-57 PERCENT.
* 24 HR TREND.........28 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTH WINDS 5 TO 10 MPH IN THE EVENING
BECOMING LIGHT OVERNIGHT.
* RIDGETOP.............SOUTHWEST 5 TO 15 MPH.
* CHANCE OF LIGHTNING...1 PERCENT.
* CWR...................ZERO.
SUNDAY
* SKY/WEATHER...........MOSTLY CLOUDY.
* MAX TEMPERATURE.......60-70 AT 5000 FEET...50-60 AT 7000 FEET.
* 24 HR TREND.........1 DEGREE WARMER.
* MIN HUMIDITY..........35-40 PERCENT.
* 24 HR TREND.........5 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........SOUTH WINDS 5 TO 10 MPH IN THE MORNING
SHIFTING TO THE NORTHWEST IN THE AFTERNOON.
* RIDGETOP.............SOUTHWEST 10 TO 20 MPH.
* CHANCE OF LIGHTNING...6 PERCENT.
* CWR...................ZERO.
SUNDAY NIGHT
* SKY/WEATHER...........MOSTLY CLOUDY. ISOLATED RAIN SHOWERS
OVERNIGHT.
* MIN TEMPERATURE.......36-46 AT 5000 FEET...34-44 AT 7000 FEET.
* 24 HR TREND.........3 DEGREES WARMER.
* MAX HUMIDITY..........66-71 PERCENT.
* 24 HR TREND.........14 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........LIGHT WINDS.
* RIDGETOP.............SOUTH 5 TO 15 MPH.
* CHANCE OF LIGHTNING...6 PERCENT.
* CWR...................LESS THAN 10 PERCENT.
MONDAY
* SKY/WEATHER...........PARTLY SUNNY. SCATTERED RAIN SHOWERS IN THE
AFTERNOON.
* MAX TEMPERATURE.......61-69 AT 5000 FEET...49-59 AT 7000 FEET.
* 24 HR TREND.........2 DEGREES COOLER.
* MIN HUMIDITY..........42-52 PERCENT AT 5000 FEET...46-56 PERCENT
AT 7000 FEET.
* 24 HR TREND.........7 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........LIGHT WINDS IN THE MORNING BECOMING
NORTHWEST 5 TO 10 MPH IN THE AFTERNOON.
* RIDGETOP.............WEST 5 TO 10 MPH.
* CHANCE OF LIGHTNING...14 PERCENT.
* CWR...................LESS THAN 10 PERCENT.
FORECAST DAYS 3 THROUGH 7...
MONDAY NIGHT
MOSTLY CLEAR. LOWS 35 TO 45. SOUTH WINDS 5 TO
10 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 40 TO 50. HIGHS 66 TO 75. SOUTHWEST
WINDS 5 TO 10 MPH.
WEDNESDAY
MOSTLY CLEAR. LOWS 37 TO 47. HIGHS 66 TO 76.
SOUTHWEST WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 38 TO 48. HIGHS 65 TO 75.
SOUTHWEST WINDS 5 TO 10 MPH.
FRIDAY
PARTLY CLOUDY. LOWS 36 TO 46. HIGHS 65 TO 75.
SATURDAY
MOSTLY SUNNY. HIGHS 58 TO 68.
MTZ124-271030-
WHEATLAND COUNTY/SWEET GRASS COUNTY-
102 PM MDT SAT SEP 26 2026
TONIGHT
* SKY/WEATHER...........PARTLY CLOUDY.
* MIN TEMPERATURE.......36-41.
* 24 HR TREND.........5 DEGREES COOLER.
* MAX HUMIDITY..........48-53 PERCENT.
* 24 HR TREND.........17 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............NORTHWEST WINDS 5 TO 15 MPH. GUSTS UP TO 30
MPH IN THE EVENING.
* CHANCE OF LIGHTNING...1 PERCENT.
* CWR...................ZERO.
SUNDAY
* SKY/WEATHER...........MOSTLY CLOUDY.
* MAX TEMPERATURE.......58-63.
* 24 HR TREND.........7 DEGREES COOLER.
* MIN HUMIDITY..........27-32 PERCENT.
* 24 HR TREND.........5 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............SOUTHEAST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
SUNDAY NIGHT
* SKY/WEATHER...........MOSTLY CLOUDY.
* MIN TEMPERATURE.......40-45.
* 24 HR TREND.........4 DEGREES WARMER.
* MAX HUMIDITY..........70-75 PERCENT.
* 24 HR TREND.........22 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............NORTHEAST WINDS 5 TO 10 MPH IN THE EVENING
SHIFTING TO THE WEST 5 TO 15 MPH OVERNIGHT.
* CHANCE OF LIGHTNING...2 PERCENT.
* CWR...................ZERO.
MONDAY
* SKY/WEATHER...........MOSTLY CLOUDY IN THE MORNING THEN CLEARING.
* MAX TEMPERATURE.......67-72.
* 24 HR TREND.........9 DEGREES WARMER.
* MIN HUMIDITY..........27-32 PERCENT.
* 24 HR TREND.........UNCHANGED.
* WIND (20 FT)
* PLAINS...............WEST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...3 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
MONDAY NIGHT
MOSTLY CLEAR. LOWS 39 TO 44. WEST WINDS 5 TO
15 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 44 TO 49. HIGHS 71 TO 76. WEST
WINDS 10 TO 20 MPH WITH GUSTS TO AROUND 30 MPH.
WEDNESDAY
MOSTLY CLEAR. LOWS 41 TO 46. HIGHS 70 TO 75.
NORTHWEST WINDS 10 TO 20 MPH WITH GUSTS TO AROUND 35 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 41 TO 46. HIGHS 66 TO 71. SOUTH
WINDS 5 TO 15 MPH.
FRIDAY
PARTLY CLOUDY. LOWS 40 TO 45. HIGHS 67 TO 72.
SATURDAY
MOSTLY SUNNY. HIGHS 59 TO 64.
MTZ125-271030-
STILLWATER COUNTY-
102 PM MDT SAT SEP 26 2026
TONIGHT
* SKY/WEATHER...........PARTLY CLOUDY.
* MIN TEMPERATURE.......41-46.
* 24 HR TREND.........3 DEGREES COOLER.
* MAX HUMIDITY..........52-57 PERCENT.
* 24 HR TREND.........17 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............NORTH WINDS 5 TO 10 MPH IN THE EVENING
BECOMING LIGHT OVERNIGHT.
* CHANCE OF LIGHTNING...2 PERCENT.
* CWR...................ZERO.
SUNDAY
* SKY/WEATHER...........PARTLY SUNNY WITH ISOLATED RAIN SHOWERS.
* MAX TEMPERATURE.......59-64.
* 24 HR TREND.........6 DEGREES COOLER.
* MIN HUMIDITY..........33-38 PERCENT.
* 24 HR TREND.........UNCHANGED.
* WIND (20 FT)
* PLAINS...............LIGHT WINDS IN THE MORNING BECOMING
NORTHEAST 5 TO 10 MPH IN THE AFTERNOON.
* CHANCE OF LIGHTNING...6 PERCENT.
* CWR...................LESS THAN 10 PERCENT.
SUNDAY NIGHT
* SKY/WEATHER...........CLOUDY. ISOLATED RAIN SHOWERS IN THE
EVENING.
* MIN TEMPERATURE.......42-47.
* 24 HR TREND.........1 DEGREE WARMER.
* MAX HUMIDITY..........69-74 PERCENT.
* 24 HR TREND.........17 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............WEST WINDS 5 TO 10 MPH.
* CHANCE OF LIGHTNING...6 PERCENT.
* CWR...................LESS THAN 10 PERCENT.
MONDAY
* SKY/WEATHER...........MOSTLY CLOUDY. ISOLATED RAIN SHOWERS IN THE
MORNING, THEN NUMEROUS RAIN SHOWERS AND ISOLATED THUNDERSTORMS IN
THE AFTERNOON.
* MAX TEMPERATURE.......64-69.
* 24 HR TREND.........5 DEGREES WARMER.
* MIN HUMIDITY..........42-47 PERCENT.
* 24 HR TREND.........9 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............SOUTHWEST WINDS 5 TO 10 MPH IN THE MORNING
SHIFTING TO THE NORTH IN THE AFTERNOON.
* CHANCE OF LIGHTNING...18 PERCENT.
* CWR...................20 PERCENT.
FORECAST DAYS 3 THROUGH 7...
MONDAY NIGHT
MOSTLY CLEAR. LOWS 40 TO 45. SOUTHWEST WINDS 5 TO
10 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 45 TO 50. HIGHS 70 TO 75. SOUTH
WINDS 5 TO 10 MPH.
WEDNESDAY
MOSTLY CLEAR. LOWS 43 TO 48. HIGHS 72 TO 77.
NORTHWEST WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 43 TO 48. HIGHS 67 TO 72. SOUTH
WINDS 5 TO 10 MPH.
FRIDAY
PARTLY CLOUDY. ISOLATED SHOWERS. LOWS 41 TO 46. HIGHS
68 TO 73.
SATURDAY
MOSTLY SUNNY. ISOLATED SHOWERS. HIGHS 60 TO 65.
MTZ126-271030-
BEARTOOTH RANGER DISTRICT CUSTER NATIONAL FOREST-
102 PM MDT SAT SEP 26 2026
TONIGHT
* SKY/WEATHER...........MOSTLY CLOUDY.
* MIN TEMPERATURE.......42-49 AT 5000 FEET...35-45 AT 7000 FEET.
* 24 HR TREND.........2 DEGREES COOLER.
* MAX HUMIDITY..........43-53 PERCENT AT 5000 FEET...54-64 PERCENT
AT 7000 FEET.
* 24 HR TREND.........11 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTHWEST WINDS 5 TO 10 MPH.
* RIDGETOP.............SOUTHWEST 10 TO 20 MPH.
* CHANCE OF LIGHTNING...1 PERCENT.
* CWR...................ZERO.
SUNDAY
* SKY/WEATHER...........MOSTLY CLOUDY WITH ISOLATED RAIN SHOWERS.
* MAX TEMPERATURE.......59-67 AT 5000 FEET...53-63 AT 7000 FEET.
* 24 HR TREND.........5 DEGREES COOLER.
* MIN HUMIDITY..........32-42 PERCENT AT 5000 FEET...38-48 PERCENT
AT 7000 FEET.
* 24 HR TREND.........7 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........SOUTHWEST WINDS 5 TO 10 MPH IN THE MORNING
SHIFTING TO THE EAST IN THE AFTERNOON.
* RIDGETOP.............SOUTHWEST 15 TO 25 MPH.
* CHANCE OF LIGHTNING...8 PERCENT.
* CWR...................LESS THAN 10 PERCENT.
SUNDAY NIGHT
* SKY/WEATHER...........MOSTLY CLOUDY WITH ISOLATED RAIN SHOWERS.
* MIN TEMPERATURE.......43-51 AT 5000 FEET...38-48 AT 7000 FEET.
* 24 HR TREND.........3 DEGREES WARMER.
* MAX HUMIDITY..........60-70 PERCENT AT 5000 FEET...64-74 PERCENT
AT 7000 FEET.
* 24 HR TREND.........9 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........SOUTHWEST WINDS 5 TO 10 MPH.
* RIDGETOP.............SOUTHWEST 10 TO 20 MPH.
* CHANCE OF LIGHTNING...7 PERCENT.
* CWR...................LESS THAN 10 PERCENT.
MONDAY
* SKY/WEATHER...........CLOUDY. SCATTERED RAIN SHOWERS IN THE
MORNING, THEN RAIN SHOWERS AND ISOLATED THUNDERSTORMS IN THE
AFTERNOON.
* MAX TEMPERATURE.......60-66 AT 5000 FEET...52-62 AT 7000 FEET.
* 24 HR TREND.........1 DEGREE COOLER.
* MIN HUMIDITY..........42-52 PERCENT AT 5000 FEET...50-60 PERCENT
AT 7000 FEET.
* 24 HR TREND.........13 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........WEST WINDS 5 TO 10 MPH IN THE MORNING
SHIFTING TO THE NORTH IN THE AFTERNOON.
* RIDGETOP.............SOUTHWEST 10 TO 20 MPH.
* CHANCE OF LIGHTNING...21 PERCENT.
* CWR...................40 PERCENT.
FORECAST DAYS 3 THROUGH 7...
MONDAY NIGHT
PARTLY CLOUDY. SCATTERED SHOWERS. LOWS 41 TO 48.
WEST WINDS 5 TO 10 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 46 TO 52. HIGHS 63 TO 72. SOUTHWEST
WINDS 5 TO 15 MPH.
WEDNESDAY
MOSTLY CLEAR. LOWS 44 TO 50. HIGHS 66 TO 73.
NORTHWEST WINDS 5 TO 15 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 44 TO 51. HIGHS 64 TO 70. SOUTH
WINDS 5 TO 10 MPH.
FRIDAY
PARTLY CLOUDY. ISOLATED SHOWERS AND SNOW SHOWERS. LOWS
42 TO 49. HIGHS 64 TO 71.
SATURDAY
MOSTLY SUNNY. ISOLATED SHOWERS AND SNOW SHOWERS.
HIGHS 56 TO 62.
MTZ127-271030-
GOLDEN VALLEY COUNTY/MUSSELSHELL COUNTY-
102 PM MDT SAT SEP 26 2026
TONIGHT
* SKY/WEATHER...........PARTLY CLOUDY.
* MIN TEMPERATURE.......43-48.
* 24 HR TREND.........3 DEGREES COOLER.
* MAX HUMIDITY..........42-47 PERCENT.
* 24 HR TREND.........30 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............NORTH WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...1 PERCENT.
* CWR...................ZERO.
SUNDAY
* SKY/WEATHER...........MOSTLY CLOUDY. ISOLATED RAIN SHOWERS IN THE
AFTERNOON.
* MAX TEMPERATURE.......56-61.
* 24 HR TREND.........7 DEGREES COOLER.
* MIN HUMIDITY..........37-42 PERCENT.
* 24 HR TREND.........6 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............EAST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...3 PERCENT.
* CWR...................LESS THAN 10 PERCENT.
SUNDAY NIGHT
* SKY/WEATHER...........MOSTLY CLOUDY. ISOLATED RAIN SHOWERS IN THE
EVENING.
* MIN TEMPERATURE.......44-49.
* 24 HR TREND.........1 DEGREE WARMER.
* MAX HUMIDITY..........62-67 PERCENT.
* 24 HR TREND.........20 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............NORTHEAST WINDS 5 TO 10 MPH IN THE EVENING
SHIFTING TO THE NORTHWEST OVERNIGHT.
* CHANCE OF LIGHTNING...3 PERCENT.
* CWR...................LESS THAN 10 PERCENT.
MONDAY
* SKY/WEATHER...........CLOUDY IN THE MORNING THEN BECOMING PARTLY
SUNNY.
* MAX TEMPERATURE.......62-67.
* 24 HR TREND.........6 DEGREES WARMER.
* MIN HUMIDITY..........40-45 PERCENT.
* 24 HR TREND.........3 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............WEST WINDS 5 TO 10 MPH.
* CHANCE OF LIGHTNING...4 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
MONDAY NIGHT
MOSTLY CLEAR. LOWS 44 TO 49. SOUTH WINDS 5 TO
10 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 49 TO 54. HIGHS 67 TO 72. WEST
WINDS 5 TO 15 MPH.
WEDNESDAY
MOSTLY CLEAR. LOWS 46 TO 51. HIGHS 67 TO 72.
NORTHWEST WINDS 5 TO 15 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 45 TO 50. HIGHS 61 TO 66. EAST
WINDS 5 TO 10 MPH.
FRIDAY
PARTLY CLOUDY. LOWS 44 TO 49. HIGHS 63 TO 68.
SATURDAY
MOSTLY SUNNY. HIGHS 54 TO 59.
MTZ128-271030-
YELLOWSTONE COUNTY-
102 PM MDT SAT SEP 26 2026
TONIGHT
* SKY/WEATHER...........MOSTLY CLOUDY.
* MIN TEMPERATURE.......44-49.
* 24 HR TREND.........6 DEGREES COOLER.
* MAX HUMIDITY..........45-50 PERCENT.
* 24 HR TREND.........11 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............NORTHEAST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...1 PERCENT.
* CWR...................ZERO.
SUNDAY
* SKY/WEATHER...........MOSTLY CLOUDY WITH ISOLATED RAIN SHOWERS.
* MAX TEMPERATURE.......62-67.
* 24 HR TREND.........5 DEGREES COOLER.
* MIN HUMIDITY..........35-40 PERCENT.
* 24 HR TREND.........UNCHANGED.
* WIND (20 FT)
* PLAINS...............NORTHEAST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...4 PERCENT.
* CWR...................LESS THAN 10 PERCENT.
SUNDAY NIGHT
* SKY/WEATHER...........CLOUDY. ISOLATED RAIN SHOWERS IN THE
EVENING.
* MIN TEMPERATURE.......45-50.
* 24 HR TREND.........1 DEGREE WARMER.
* MAX HUMIDITY..........68-73 PERCENT.
* 24 HR TREND.........23 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............NORTHEAST WINDS 5 TO 10 MPH IN THE EVENING
SHIFTING TO THE WEST OVERNIGHT.
* CHANCE OF LIGHTNING...4 PERCENT.
* CWR...................LESS THAN 10 PERCENT.
MONDAY
* SKY/WEATHER...........CLOUDY IN THE MORNING THEN BECOMING PARTLY
SUNNY.
* MAX TEMPERATURE.......66-71.
* 24 HR TREND.........4 DEGREES WARMER.
* MIN HUMIDITY..........42-47 PERCENT.
* 24 HR TREND.........7 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............WEST WINDS 5 TO 10 MPH.
* CHANCE OF LIGHTNING...4 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
MONDAY NIGHT
PARTLY CLOUDY. LOWS 44 TO 49. SOUTH WINDS 5 TO
10 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 48 TO 53. HIGHS 72 TO 77. SOUTHWEST
WINDS 5 TO 15 MPH.
WEDNESDAY
MOSTLY CLEAR. LOWS 46 TO 51. HIGHS 73 TO 78.
NORTHWEST WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 46 TO 51. HIGHS 68 TO 73.
NORTHEAST WINDS 5 TO 10 MPH.
FRIDAY
PARTLY CLOUDY. LOWS 44 TO 49. HIGHS 68 TO 73.
SATURDAY
MOSTLY SUNNY. HIGHS 60 TO 65.
MTZ129-271030-
CROW INDIAN RESERVATION/BIGHORN CANYON REC AREA-
102 PM MDT SAT SEP 26 2026
TONIGHT
* SKY/WEATHER...........PARTLY CLOUDY.
* MIN TEMPERATURE.......41-49 AT 5000 FEET...40-45 AT 7000 FEET.
* 24 HR TREND.........3 DEGREES COOLER.
* MAX HUMIDITY..........48-53 PERCENT.
* 24 HR TREND.........13 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTHEAST WINDS 5 TO 10 MPH.
* RIDGETOP.............SOUTHWEST 15 TO 30 MPH.
* CHANCE OF LIGHTNING...1 PERCENT.
* CWR...................ZERO.
SUNDAY
* SKY/WEATHER...........PARTLY SUNNY. ISOLATED RAIN SHOWERS IN THE
MORNING.
* MAX TEMPERATURE.......58-68 AT 5000 FEET...54-60 AT 7000 FEET.
* 24 HR TREND.........3 DEGREES COOLER.
* MIN HUMIDITY..........32-42 PERCENT AT 5000 FEET...39-47 PERCENT
AT 7000 FEET.
* 24 HR TREND.........7 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........EAST WINDS 5 TO 15 MPH.
* RIDGETOP.............SOUTHWEST 15 TO 25 MPH.
* CHANCE OF LIGHTNING...2 PERCENT.
* CWR...................LESS THAN 10 PERCENT.
SUNDAY NIGHT
* SKY/WEATHER...........CLOUDY WITH ISOLATED RAIN SHOWERS.
* MIN TEMPERATURE.......46-51.
* 24 HR TREND.........3 DEGREES WARMER.
* MAX HUMIDITY..........64-74 PERCENT AT 5000 FEET...61-69 PERCENT
AT 7000 FEET.
* 24 HR TREND.........25 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........EAST WINDS 5 TO 10 MPH IN THE EVENING
SHIFTING TO THE SOUTHWEST OVERNIGHT.
* RIDGETOP.............SOUTHWEST 15 TO 25 MPH.
* CHANCE OF LIGHTNING...6 PERCENT.
* CWR...................10 PERCENT.
MONDAY
* SKY/WEATHER...........MOSTLY CLOUDY. ISOLATED RAIN SHOWERS IN THE
AFTERNOON.
* MAX TEMPERATURE.......58-68 AT 5000 FEET...52-58 AT 7000 FEET.
* 24 HR TREND.........2 DEGREES COOLER.
* MIN HUMIDITY..........42-52 PERCENT AT 5000 FEET...54-64 PERCENT
AT 7000 FEET.
* 24 HR TREND.........9 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTHWEST WINDS 5 TO 10 MPH.
* RIDGETOP.............WEST 10 TO 20 MPH.
* CHANCE OF LIGHTNING...8 PERCENT.
* CWR...................LESS THAN 10 PERCENT.
FORECAST DAYS 3 THROUGH 7...
MONDAY NIGHT
PARTLY CLOUDY. LOWS 43 TO 48. SOUTHWEST WINDS
5 TO 10 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 47 TO 53. HIGHS 63 TO 73. SOUTH
WINDS 5 TO 10 MPH.
WEDNESDAY
MOSTLY CLEAR. LOWS 45 TO 50. HIGHS 65 TO 75. NORTH
WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 46 TO 52. HIGHS 62 TO 72.
SOUTHEAST WINDS 5 TO 10 MPH.
FRIDAY
PARTLY CLOUDY. LOWS 43 TO 48. HIGHS 62 TO 72.
SATURDAY
MOSTLY SUNNY. ISOLATED SHOWERS. HIGHS 53 TO 63.
MTZ130-271030-
NORTHERN ROSEBUD/NORTHERN TREASURE COUNTIES-
102 PM MDT SAT SEP 26 2026
TONIGHT
* SKY/WEATHER...........PARTLY CLOUDY.
* MIN TEMPERATURE.......41-46.
* 24 HR TREND.........7 DEGREES COOLER.
* MAX HUMIDITY..........49-54 PERCENT.
* 24 HR TREND.........32 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............NORTH WINDS 5 TO 10 MPH.
* CHANCE OF LIGHTNING...1 PERCENT.
* CWR...................ZERO.
SUNDAY
* SKY/WEATHER...........MOSTLY CLOUDY WITH ISOLATED RAIN SHOWERS.
* MAX TEMPERATURE.......64-69.
* 24 HR TREND.........3 DEGREES COOLER.
* MIN HUMIDITY..........29-34 PERCENT.
* 24 HR TREND.........UNCHANGED.
* WIND (20 FT)
* PLAINS...............EAST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...1 PERCENT.
* CWR...................LESS THAN 10 PERCENT.
SUNDAY NIGHT
* SKY/WEATHER...........CLOUDY WITH ISOLATED RAIN SHOWERS.
* MIN TEMPERATURE.......46-51.
* 24 HR TREND.........5 DEGREES WARMER.
* MAX HUMIDITY..........94-99 PERCENT.
* 24 HR TREND.........45 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............NORTHEAST WINDS 5 TO 10 MPH.
* CHANCE OF LIGHTNING...4 PERCENT.
* CWR...................LESS THAN 10 PERCENT.
MONDAY
* SKY/WEATHER...........MOSTLY CLOUDY. PATCHY FOG IN THE MORNING.
* MAX TEMPERATURE.......66-71.
* 24 HR TREND.........2 DEGREES WARMER.
* MIN HUMIDITY..........43-48 PERCENT.
* 24 HR TREND.........14 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............NORTHWEST WINDS 5 TO 10 MPH.
* CHANCE OF LIGHTNING...2 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
MONDAY NIGHT
PARTLY CLOUDY. LOWS 44 TO 49. WEST WINDS 5 TO
10 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 47 TO 52. HIGHS 72 TO 77. SOUTHWEST
WINDS 5 TO 10 MPH.
WEDNESDAY
MOSTLY CLEAR. LOWS 45 TO 50. HIGHS 72 TO 77.
NORTHWEST WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 45 TO 50. HIGHS 67 TO 72. EAST
WINDS 5 TO 10 MPH.
FRIDAY
PARTLY CLOUDY. LOWS 44 TO 49. HIGHS 67 TO 72.
SATURDAY
MOSTLY SUNNY. HIGHS 60 TO 65.
MTZ131-271030-
NORTHERN CHEYENNE INDIAN RESERVATION/ASHLAND RANGER DISTRICT
CUSTER NATL FOREST-
102 PM MDT SAT SEP 26 2026
TONIGHT
* SKY/WEATHER...........PARTLY CLOUDY.
* MIN TEMPERATURE.......41-46.
* 24 HR TREND.........9 DEGREES COOLER.
* MAX HUMIDITY..........53-58 PERCENT.
* 24 HR TREND.........19 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTH WINDS 5 TO 10 MPH.
* RIDGETOP.............NORTHEAST 10 TO 20 MPH.
* CHANCE OF LIGHTNING...1 PERCENT.
* CWR...................ZERO.
SUNDAY
* SKY/WEATHER...........PARTLY SUNNY. ISOLATED RAIN SHOWERS IN THE
MORNING.
* MAX TEMPERATURE.......68-73.
* 24 HR TREND.........1 DEGREE COOLER.
* MIN HUMIDITY..........32-37 PERCENT.
* 24 HR TREND.........8 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........EAST WINDS 5 TO 15 MPH.
* RIDGETOP.............EAST 10 TO 20 MPH.
* CHANCE OF LIGHTNING...2 PERCENT.
* CWR...................LESS THAN 10 PERCENT.
SUNDAY NIGHT
* SKY/WEATHER...........CLOUDY WITH SCATTERED RAIN SHOWERS.
* MIN TEMPERATURE.......46-51.
* 24 HR TREND.........5 DEGREES WARMER.
* MAX HUMIDITY..........90-95 PERCENT.
* 24 HR TREND.........37 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........EAST WINDS 5 TO 15 MPH IN THE EVENING
SHIFTING TO THE SOUTHWEST 5 TO 10 MPH OVERNIGHT.
* RIDGETOP.............SOUTHEAST 10 TO 20 MPH.
* CHANCE OF LIGHTNING...11 PERCENT.
* CWR...................30 PERCENT.
MONDAY
* SKY/WEATHER...........MOSTLY CLOUDY WITH ISOLATED RAIN SHOWERS.
* MAX TEMPERATURE.......66-71.
* 24 HR TREND.........2 DEGREES COOLER.
* MIN HUMIDITY..........43-48 PERCENT.
* 24 HR TREND.........11 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTHWEST WINDS 5 TO 10 MPH.
* RIDGETOP.............NORTHWEST 10 TO 15 MPH.
* CHANCE OF LIGHTNING...4 PERCENT.
* CWR...................LESS THAN 10 PERCENT.
FORECAST DAYS 3 THROUGH 7...
MONDAY NIGHT
PARTLY CLOUDY. PATCHY FOG. LOWS 43 TO 48. WEST
WINDS 5 TO 10 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 45 TO 50. HIGHS 71 TO 76. SOUTHWEST
WINDS 5 TO 10 MPH.
WEDNESDAY
MOSTLY CLEAR. LOWS 44 TO 49. HIGHS 74 TO 79. NORTH
WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 44 TO 49. HIGHS 70 TO 75.
SOUTHEAST WINDS 5 TO 10 MPH.
FRIDAY
PARTLY CLOUDY. LOWS 42 TO 47. HIGHS 71 TO 76.
SATURDAY
MOSTLY SUNNY. HIGHS 61 TO 66.
MTZ132-271030-
CUSTER COUNTY-
102 PM MDT SAT SEP 26 2026
TONIGHT
* SKY/WEATHER...........PARTLY CLOUDY.
* MIN TEMPERATURE.......44-49.
* 24 HR TREND.........8 DEGREES COOLER.
* MAX HUMIDITY..........44-49 PERCENT.
* 24 HR TREND.........44 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............NORTH WINDS 5 TO 10 MPH.
* CHANCE OF LIGHTNING...1 PERCENT.
* CWR...................ZERO.
SUNDAY
* SKY/WEATHER...........MOSTLY CLOUDY WITH ISOLATED RAIN SHOWERS.
* MAX TEMPERATURE.......64-69.
* 24 HR TREND.........1 DEGREE COOLER.
* MIN HUMIDITY..........28-33 PERCENT.
* 24 HR TREND.........4 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............EAST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................LESS THAN 10 PERCENT.
SUNDAY NIGHT
* SKY/WEATHER...........CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS
IN THE EVENING, THEN SCATTERED RAIN SHOWERS AND ISOLATED
THUNDERSTORMS OVERNIGHT.
* MIN TEMPERATURE.......49-54.
* 24 HR TREND.........5 DEGREES WARMER.
* MAX HUMIDITY..........100 PERCENT.
* 24 HR TREND.........54 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............SOUTHEAST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...17 PERCENT.
* CWR...................40 PERCENT.
MONDAY
* SKY/WEATHER...........MOSTLY CLOUDY. SCATTERED RAIN SHOWERS IN
THE MORNING. PATCHY FOG IN THE MORNING.
* MAX TEMPERATURE.......64-69.
* 24 HR TREND.........UNCHANGED.
* MIN HUMIDITY..........61-66 PERCENT.
* 24 HR TREND.........33 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............SOUTHWEST WINDS 5 TO 10 MPH IN THE MORNING
SHIFTING TO THE NORTHWEST IN THE AFTERNOON.
* CHANCE OF LIGHTNING...8 PERCENT.
* CWR...................LESS THAN 10 PERCENT.
FORECAST DAYS 3 THROUGH 7...
MONDAY NIGHT
PARTLY CLOUDY. LOWS 45 TO 50. NORTHWEST WINDS
5 TO 10 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 47 TO 52. HIGHS 68 TO 73. SOUTHWEST
WINDS 5 TO 15 MPH.
WEDNESDAY
MOSTLY CLEAR. LOWS 46 TO 51. HIGHS 70 TO 75.
NORTHWEST WINDS 5 TO 15 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 45 TO 50. HIGHS 64 TO 69.
SOUTHEAST WINDS 5 TO 15 MPH.
FRIDAY
PARTLY CLOUDY. LOWS 44 TO 49. HIGHS 66 TO 71.
SATURDAY
MOSTLY SUNNY. HIGHS 57 TO 62.
MTZ133-271030-
SIOUX RANGER DISTRICT CUSTER NATIONAL FOREST-
102 PM MDT SAT SEP 26 2026
TONIGHT
* SKY/WEATHER...........PARTLY CLOUDY.
* MIN TEMPERATURE.......46-51.
* 24 HR TREND.........7 DEGREES COOLER.
* MAX HUMIDITY..........54-59 PERCENT.
* 24 HR TREND.........44 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............NORTH WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...4 PERCENT.
* CWR...................ZERO.
SUNDAY
* SKY/WEATHER...........MOSTLY CLOUDY WITH ISOLATED RAIN SHOWERS.
* MAX TEMPERATURE.......66-71.
* 24 HR TREND.........4 DEGREES COOLER.
* MIN HUMIDITY..........33-38 PERCENT.
* 24 HR TREND.........8 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............EAST WINDS 10 TO 20 MPH. GUSTS UP TO 30 MPH
IN THE AFTERNOON.
* CHANCE OF LIGHTNING...4 PERCENT.
* CWR...................LESS THAN 10 PERCENT.
SUNDAY NIGHT
* SKY/WEATHER...........CLOUDY. SCATTERED RAIN SHOWERS AND ISOLATED
THUNDERSTORMS IN THE EVENING, THEN NUMEROUS RAIN SHOWERS AND
SCATTERED THUNDERSTORMS OVERNIGHT.
* MIN TEMPERATURE.......51-56.
* 24 HR TREND.........5 DEGREES WARMER.
* MAX HUMIDITY..........100 PERCENT.
* 24 HR TREND.........44 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............SOUTHEAST WINDS 10 TO 20 MPH. GUSTS UP TO 30
MPH IN THE EVENING.
* CHANCE OF LIGHTNING...25 PERCENT.
* CWR...................60 PERCENT.
MONDAY
* SKY/WEATHER...........MOSTLY CLOUDY. SCATTERED RAIN SHOWERS IN
THE MORNING, THEN SCATTERED RAIN SHOWERS AND ISOLATED
THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.......69-74.
* 24 HR TREND.........3 DEGREES WARMER.
* MIN HUMIDITY..........62-67 PERCENT.
* 24 HR TREND.........29 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............SOUTH WINDS 5 TO 10 MPH IN THE MORNING
SHIFTING TO THE NORTHWEST 5 TO 15 MPH IN THE AFTERNOON.
* CHANCE OF LIGHTNING...15 PERCENT.
* CWR...................LESS THAN 10 PERCENT.
FORECAST DAYS 3 THROUGH 7...
MONDAY NIGHT
MOSTLY CLOUDY. PATCHY FOG. LOWS 47 TO 52.
NORTHWEST WINDS 5 TO 15 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 46 TO 51. HIGHS 71 TO 76. SOUTHWEST
WINDS 5 TO 15 MPH.
WEDNESDAY
MOSTLY CLEAR. LOWS 46 TO 51. HIGHS 74 TO 79.
NORTHWEST WINDS 5 TO 15 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 45 TO 50. HIGHS 67 TO 72. EAST
WINDS 5 TO 15 MPH.
FRIDAY
PARTLY CLOUDY. LOWS 44 TO 49. HIGHS 68 TO 73.
SATURDAY
MOSTLY SUNNY. HIGHS 60 TO 65.
WYZ274-271030-
SHERIDAN COUNTY-
102 PM MDT SAT SEP 26 2026
TONIGHT
* SKY/WEATHER...........MOSTLY CLEAR.
* MIN TEMPERATURE.......39-44.
* 24 HR TREND.........8 DEGREES COOLER.
* MAX HUMIDITY..........79-84 PERCENT.
* 24 HR TREND.........13 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTHWEST WINDS 5 TO 10 MPH IN THE EVENING
BECOMING LIGHT OVERNIGHT.
* RIDGETOP.............SOUTHWEST 10 TO 20 MPH.
* CHANCE OF LIGHTNING...1 PERCENT.
* CWR...................ZERO.
SUNDAY
* SKY/WEATHER...........PARTLY SUNNY.
* MAX TEMPERATURE.......66-71.
* 24 HR TREND.........4 DEGREES COOLER.
* MIN HUMIDITY..........36-41 PERCENT.
* 24 HR TREND.........7 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........LIGHT WINDS IN THE MORNING BECOMING EAST 5
TO 10 MPH IN THE AFTERNOON.
* RIDGETOP.............SOUTHWEST 10 TO 20 MPH.
* CHANCE OF LIGHTNING...3 PERCENT.
* CWR...................ZERO.
SUNDAY NIGHT
* SKY/WEATHER...........CLOUDY. ISOLATED RAIN SHOWERS IN THE
EVENING, THEN SCATTERED RAIN SHOWERS OVERNIGHT.
* MIN TEMPERATURE.......44-49.
* 24 HR TREND.........5 DEGREES WARMER.
* MAX HUMIDITY..........81-86 PERCENT.
* 24 HR TREND.........2 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........LIGHT WINDS.
* RIDGETOP.............SOUTHWEST 10 TO 20 MPH.
* CHANCE OF LIGHTNING...8 PERCENT.
* CWR...................LESS THAN 10 PERCENT.
MONDAY
* SKY/WEATHER...........PARTLY SUNNY. ISOLATED RAIN SHOWERS IN THE
MORNING, THEN SCATTERED RAIN SHOWERS IN THE AFTERNOON.
* MAX TEMPERATURE.......63-68.
* 24 HR TREND.........3 DEGREES COOLER.
* MIN HUMIDITY..........48-53 PERCENT.
* 24 HR TREND.........12 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTHWEST WINDS 5 TO 10 MPH.
* RIDGETOP.............WEST 5 TO 15 MPH.
* CHANCE OF LIGHTNING...11 PERCENT.
* CWR...................10 PERCENT.
FORECAST DAYS 3 THROUGH 7...
MONDAY NIGHT
PARTLY CLOUDY. PATCHY FOG. SCATTERED SHOWERS.
LOWS 39 TO 44. WEST WINDS 5 TO 10 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 40 TO 45. HIGHS 69 TO 74. SOUTH
WINDS 5 TO 10 MPH.
WEDNESDAY
MOSTLY CLEAR. LOWS 41 TO 46. HIGHS 72 TO 77.
NORTHWEST WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 41 TO 46. HIGHS 69 TO 74.
SOUTHEAST WINDS 5 TO 10 MPH.
FRIDAY
PARTLY CLOUDY. LOWS 39 TO 44. HIGHS 70 TO 75.
SATURDAY
MOSTLY SUNNY. ISOLATED SHOWERS. HIGHS 61 TO 66.
WYZ284-271030-
BIGHORN NATIONAL FOREST-
102 PM MDT SAT SEP 26 2026
TONIGHT
* SKY/WEATHER...........PARTLY CLOUDY.
* MIN TEMPERATURE.......34-39.
* 24 HR TREND.........2 DEGREES WARMER.
* MAX HUMIDITY..........74-79 PERCENT.
* 24 HR TREND.........6 PERCENT DRIER.
* WIND (20 FT)
* AT BURGESS JCT.......SOUTHWEST WINDS 5 TO 10 MPH.
* CHANCE OF LIGHTNING...2 PERCENT.
* CWR...................ZERO.
SUNDAY
* SKY/WEATHER...........PARTLY SUNNY. ISOLATED RAIN SHOWERS IN THE
MORNING.
* MAX TEMPERATURE.......57-62.
* 24 HR TREND.........3 DEGREES COOLER.
* MIN HUMIDITY..........34-39 PERCENT.
* 24 HR TREND.........7 PERCENT WETTER.
* WIND (20 FT)
* AT BURGESS JCT.......SOUTH WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...3 PERCENT.
* CWR...................LESS THAN 10 PERCENT.
SUNDAY NIGHT
* SKY/WEATHER...........MOSTLY CLOUDY. SCATTERED RAIN SHOWERS IN
THE EVENING, THEN ISOLATED RAIN SHOWERS AND SNOW SHOWERS
OVERNIGHT.
* MIN TEMPERATURE.......37-42.
* 24 HR TREND.........3 DEGREES WARMER.
* MAX HUMIDITY..........81-86 PERCENT.
* 24 HR TREND.........7 PERCENT WETTER.
* WIND (20 FT)
* AT BURGESS JCT.......SOUTH WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...6 PERCENT.
* CWR...................10 PERCENT.
MONDAY
* SKY/WEATHER...........MOSTLY CLOUDY. SCATTERED RAIN SHOWERS IN
THE MORNING, THEN NUMEROUS RAIN SHOWERS IN THE AFTERNOON.
* MAX TEMPERATURE.......52-57.
* 24 HR TREND.........5 DEGREES COOLER.
* MIN HUMIDITY..........53-58 PERCENT.
* 24 HR TREND.........19 PERCENT WETTER.
* WIND (20 FT)
* AT BURGESS JCT.......WEST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...14 PERCENT.
* CWR...................30 PERCENT.
FORECAST DAYS 3 THROUGH 7...
MONDAY NIGHT
MOSTLY CLOUDY. PATCHY FOG. SCATTERED SHOWERS.
LOWS 30 TO 35. WEST WINDS 5 TO 10 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 34 TO 39. HIGHS 56 TO 61. SOUTHWEST
WINDS 5 TO 10 MPH.
WEDNESDAY
MOSTLY CLEAR. LOWS 33 TO 38. HIGHS 59 TO 64. WEST
WINDS 5 TO 15 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 35 TO 40. HIGHS 56 TO 61.
SOUTHWEST WINDS 5 TO 15 MPH.
FRIDAY
PARTLY CLOUDY. ISOLATED SHOWERS. LOWS 32 TO 37. HIGHS
57 TO 62.
SATURDAY
MOSTLY SUNNY. ISOLATED SHOWERS AND SNOW SHOWERS.
HIGHS 49 TO 54.
WEATHER.GOV/BILLINGS
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page