351
FNUS55 KBYZ 270717
FWFBYZ
FIRE WEATHER PLANNING FORECAST FOR SCEN AND SERN MONTANA
NATIONAL WEATHER SERVICE BILLINGS MT
117 AM MDT SUN SEP 27 2026
DISCUSSION
CONDITIONS WILL BE CALM AND SEASONABLE TODAY WITH A FEW LIGHT
SHOWERS POSSIBLE. THE CHANCE OF WETTING RAIN WILL BE RATHER LOW
THROUGH THE DAY FOR MOST LOCATIONS. INTO THE EVENING AND OVERNIGHT
HOURS, ISOLATED SHOWERS AND THUNDERSTORMS ARE EXPECTED, MAINLY
FOR SOUTHEAST MT AND NW SOUTH DAKOTA (SIOUX RANGER DISTRICT).
LOCALLY HEAVY RAIN IS POSSIBLE UNDER ANY STRONGER THUNDERSTORMS AS
WELL AS SMALL HAIL AND GUSTY WIND. ISOLATED SHOWER AND SOME
THUNDERSTORMS ARE THEN POSSIBLE OVER THE BEARTOOTHS MONDAY
AFTERNOON AND EXTENDING EAST ALONG THE MT/WY STATELINE INTO THE
BIGHORNS REGION BY MONDAY EVENING. AS WESTERLY FLOW AND HIGH
PRESSURE ALOFT BUILDS IN TUESDAY THROUGH THURSDAY, MILD TEMPS AND
DRYER (MINIMUM RHS 20-30%) CONDITIONS WILL PREVAIL. BT
MTZ123-272215-
GALLATIN NATIONAL FOREST-
117 AM MDT SUN SEP 27 2026
TODAY
* SKY/WEATHER...........MOSTLY CLOUDY. ISOLATED RAIN SHOWERS IN THE
AFTERNOON.
* MAX TEMPERATURE.......60-70 AT 5000 FEET...50-60 AT 7000 FEET.
* 24 HR TREND.........2 DEGREES WARMER.
* MIN HUMIDITY..........34-39 PERCENT.
* 24 HR TREND.........4 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...4 PERCENT.
* CWR...................ZERO.
TONIGHT
* SKY/WEATHER...........MOSTLY CLOUDY. ISOLATED RAIN SHOWERS
OVERNIGHT.
* MIN TEMPERATURE.......36-46 AT 5000 FEET...34-44 AT 7000 FEET.
* 24 HR TREND.........5 DEGREES WARMER.
* MAX HUMIDITY..........65-70 PERCENT.
* 24 HR TREND.........11 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTHEAST WINDS 5 TO 10 MPH IN THE EVENING
SHIFTING TO THE SOUTHEAST OVERNIGHT.
* RIDGETOP.............SOUTHWEST 10 TO 20 MPH.
* CHANCE OF LIGHTNING...7 PERCENT.
* CWR...................ZERO.
MONDAY
* SKY/WEATHER...........PARTLY SUNNY. ISOLATED SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.......61-69 AT 5000 FEET...49-59 AT 7000 FEET.
* 24 HR TREND.........3 DEGREES COOLER.
* MIN HUMIDITY..........43-53 PERCENT AT 5000 FEET...47-57 PERCENT
AT 7000 FEET.
* 24 HR TREND.........9 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........SOUTHWEST WINDS 5 TO 10 MPH IN THE MORNING
SHIFTING TO THE NORTHWEST IN THE AFTERNOON.
* RIDGETOP.............SOUTHWEST 10 TO 20 MPH.
* CHANCE OF LIGHTNING...15 PERCENT.
* CWR...................10 PERCENT.
FORECAST DAYS 3 THROUGH 7...
MONDAY NIGHT
MOSTLY CLEAR. LOWS 35 TO 45. SOUTHWEST WINDS 5 TO
10 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 40 TO 50. HIGHS 65 TO 74. SOUTHWEST
WINDS 5 TO 10 MPH.
WEDNESDAY
MOSTLY CLEAR. LOWS 37 TO 47. HIGHS 65 TO 75.
SOUTHWEST WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 39 TO 49. HIGHS 66 TO 76.
SOUTHWEST WINDS 5 TO 10 MPH.
FRIDAY
PARTLY CLOUDY. ISOLATED SHOWERS. LOWS 38 TO 48. HIGHS
65 TO 75.
SATURDAY
MOSTLY SUNNY. ISOLATED SHOWERS. HIGHS 58 TO 68.
MTZ124-272215-
WHEATLAND COUNTY/SWEET GRASS COUNTY-
117 AM MDT SUN SEP 27 2026
TODAY
* SKY/WEATHER...........MOSTLY CLOUDY.
* MAX TEMPERATURE.......58-63.
* 24 HR TREND.........7 DEGREES COOLER.
* MIN HUMIDITY..........27-32 PERCENT.
* 24 HR TREND.........4 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............SOUTHEAST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...1 PERCENT.
* CWR...................ZERO.
TONIGHT
* SKY/WEATHER...........MOSTLY CLOUDY.
* MIN TEMPERATURE.......40-45.
* 24 HR TREND.........5 DEGREES WARMER.
* MAX HUMIDITY..........67-72 PERCENT.
* 24 HR TREND.........18 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............NORTH WINDS 5 TO 15 MPH IN THE EVENING
SHIFTING TO THE WEST OVERNIGHT.
* CHANCE OF LIGHTNING...2 PERCENT.
* CWR...................ZERO.
MONDAY
* SKY/WEATHER...........MOSTLY SUNNY.
* 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...0 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 45 TO 50. HIGHS 70 TO 75. WEST
WINDS 15 TO 25 MPH WITH GUSTS TO AROUND 35 MPH.
WEDNESDAY
MOSTLY CLEAR. LOWS 40 TO 45. HIGHS 68 TO 73.
NORTHWEST WINDS 10 TO 20 MPH WITH GUSTS TO AROUND 30 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 43 TO 48. HIGHS 67 TO 72. SOUTH
WINDS 5 TO 10 MPH.
FRIDAY
PARTLY CLOUDY. ISOLATED SHOWERS. LOWS 42 TO 47. HIGHS
68 TO 73.
SATURDAY
PARTLY SUNNY. ISOLATED SHOWERS. HIGHS 60 TO 65.
MTZ125-272215-
STILLWATER COUNTY-
117 AM MDT SUN SEP 27 2026
TODAY
* SKY/WEATHER...........MOSTLY CLOUDY.
* MAX TEMPERATURE.......58-63.
* 24 HR TREND.........7 DEGREES COOLER.
* MIN HUMIDITY..........32-37 PERCENT.
* 24 HR TREND.........2 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............NORTHEAST WINDS 5 TO 10 MPH.
* CHANCE OF LIGHTNING...5 PERCENT.
* CWR...................ZERO.
TONIGHT
* SKY/WEATHER...........MOSTLY CLOUDY. ISOLATED RAIN SHOWERS
OVERNIGHT.
* MIN TEMPERATURE.......42-47.
* 24 HR TREND.........2 DEGREES WARMER.
* MAX HUMIDITY..........67-72 PERCENT.
* 24 HR TREND.........14 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............WEST WINDS 5 TO 10 MPH.
* CHANCE OF LIGHTNING...5 PERCENT.
* CWR...................ZERO.
MONDAY
* SKY/WEATHER...........MOSTLY CLOUDY. ISOLATED RAIN SHOWERS IN THE
MORNING, THEN SCATTERED RAIN SHOWERS AND ISOLATED THUNDERSTORMS
IN THE AFTERNOON.
* MAX TEMPERATURE.......64-69.
* 24 HR TREND.........6 DEGREES WARMER.
* MIN HUMIDITY..........40-45 PERCENT.
* 24 HR TREND.........8 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............SOUTH WINDS 5 TO 10 MPH IN THE MORNING
SHIFTING TO THE NORTH IN THE AFTERNOON.
* CHANCE OF LIGHTNING...19 PERCENT.
* CWR...................20 PERCENT.
FORECAST DAYS 3 THROUGH 7...
MONDAY NIGHT
PARTLY CLOUDY. LOWS 40 TO 45. SOUTHWEST WINDS
5 TO 10 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 44 TO 49. HIGHS 70 TO 75. SOUTHWEST
WINDS 5 TO 10 MPH.
WEDNESDAY
MOSTLY CLEAR. LOWS 43 TO 48. HIGHS 70 TO 75. WEST
WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 44 TO 49. HIGHS 68 TO 73. SOUTH
WINDS 5 TO 10 MPH.
FRIDAY
PARTLY CLOUDY. ISOLATED SHOWERS. LOWS 44 TO 49. HIGHS
69 TO 74.
SATURDAY
PARTLY SUNNY. ISOLATED SHOWERS. HIGHS 61 TO 66.
MTZ126-272215-
BEARTOOTH RANGER DISTRICT CUSTER NATIONAL FOREST-
117 AM MDT SUN SEP 27 2026
TODAY
* SKY/WEATHER...........MOSTLY CLOUDY. ISOLATED RAIN SHOWERS AND
SNOW SHOWERS IN THE MORNING, THEN ISOLATED RAIN SHOWERS IN THE
AFTERNOON.
* 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.........17 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........SOUTH WINDS 5 TO 10 MPH IN THE MORNING
SHIFTING TO THE EAST IN THE AFTERNOON.
* RIDGETOP.............SOUTHWEST 10 TO 20 MPH.
* CHANCE OF LIGHTNING...8 PERCENT.
* CWR...................ZERO.
TONIGHT
* SKY/WEATHER...........MOSTLY CLOUDY. ISOLATED RAIN SHOWERS
OVERNIGHT.
* MIN TEMPERATURE.......43-52 AT 5000 FEET...39-49 AT 7000 FEET.
* 24 HR TREND.........5 DEGREES WARMER.
* MAX HUMIDITY..........59-69 PERCENT AT 5000 FEET...62-72 PERCENT
AT 7000 FEET.
* 24 HR TREND.........6 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........SOUTHWEST WINDS 5 TO 10 MPH.
* RIDGETOP.............SOUTHWEST 10 TO 20 MPH.
* CHANCE OF LIGHTNING...6 PERCENT.
* CWR...................ZERO.
MONDAY
* SKY/WEATHER...........CLOUDY. ISOLATED RAIN SHOWERS IN THE
MORNING, THEN SCATTERED RAIN SHOWERS AND ISOLATED THUNDERSTORMS
IN THE AFTERNOON.
* MAX TEMPERATURE.......61-66 AT 5000 FEET...52-62 AT 7000 FEET.
* 24 HR TREND.........UNCHANGED.
* MIN HUMIDITY..........41-51 PERCENT AT 5000 FEET...49-59 PERCENT
AT 7000 FEET.
* 24 HR TREND.........11 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTH WINDS 5 TO 10 MPH.
* RIDGETOP.............WEST 5 TO 15 MPH.
* CHANCE OF LIGHTNING...23 PERCENT.
* CWR...................30 PERCENT.
FORECAST DAYS 3 THROUGH 7...
MONDAY NIGHT
PARTLY CLOUDY. SCATTERED SHOWERS. LOWS 41 TO 48.
WEST WINDS 5 TO 15 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 65 TO 72. WEST
WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 45 TO 53. HIGHS 64 TO 71.
SOUTHWEST WINDS 5 TO 10 MPH.
FRIDAY
PARTLY CLOUDY. ISOLATED SHOWERS. LOWS 45 TO 51. HIGHS
65 TO 72.
SATURDAY
PARTLY SUNNY. SCATTERED SHOWERS AND ISOLATED SNOW
SHOWERS. HIGHS 57 TO 64.
MTZ127-272215-
GOLDEN VALLEY COUNTY/MUSSELSHELL COUNTY-
117 AM MDT SUN SEP 27 2026
TODAY
* SKY/WEATHER...........MOSTLY CLOUDY.
* MAX TEMPERATURE.......56-61.
* 24 HR TREND.........8 DEGREES COOLER.
* MIN HUMIDITY..........37-42 PERCENT.
* 24 HR TREND.........12 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............EAST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
TONIGHT
* SKY/WEATHER...........MOSTLY CLOUDY. ISOLATED RAIN SHOWERS IN THE
EVENING.
* MIN TEMPERATURE.......44-49.
* 24 HR TREND.........3 DEGREES WARMER.
* MAX HUMIDITY..........60-65 PERCENT.
* 24 HR TREND.........16 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...................ZERO.
MONDAY
* SKY/WEATHER...........CLOUDY IN THE MORNING THEN BECOMING MOSTLY
SUNNY.
* MAX TEMPERATURE.......62-67.
* 24 HR TREND.........6 DEGREES WARMER.
* MIN HUMIDITY..........39-44 PERCENT.
* 24 HR TREND.........2 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............NORTHWEST WINDS 5 TO 15 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
15 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 49 TO 54. HIGHS 67 TO 72. WEST
WINDS 5 TO 15 MPH.
WEDNESDAY
MOSTLY CLEAR. LOWS 45 TO 50. HIGHS 65 TO 70. NORTH
WINDS 5 TO 15 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 46 TO 51. HIGHS 61 TO 66.
SOUTHEAST WINDS 5 TO 10 MPH.
FRIDAY
PARTLY CLOUDY. ISOLATED SHOWERS. LOWS 46 TO 51. HIGHS
63 TO 68.
SATURDAY
PARTLY SUNNY. ISOLATED SHOWERS. HIGHS 56 TO 61.
MTZ128-272215-
YELLOWSTONE COUNTY-
117 AM MDT SUN SEP 27 2026
TODAY
* SKY/WEATHER...........MOSTLY CLOUDY.
* MAX TEMPERATURE.......62-67.
* 24 HR TREND.........5 DEGREES COOLER.
* MIN HUMIDITY..........35-40 PERCENT.
* 24 HR TREND.........4 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............EAST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
TONIGHT
* SKY/WEATHER...........MOSTLY CLOUDY. ISOLATED RAIN SHOWERS IN THE
EVENING.
* MIN TEMPERATURE.......45-50.
* 24 HR TREND.........1 DEGREE WARMER.
* MAX HUMIDITY..........66-71 PERCENT.
* 24 HR TREND.........21 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............NORTH WINDS 5 TO 15 MPH IN THE EVENING
SHIFTING TO THE WEST 5 TO 10 MPH OVERNIGHT.
* CHANCE OF LIGHTNING...4 PERCENT.
* CWR...................ZERO.
MONDAY
* SKY/WEATHER...........CLOUDY IN THE MORNING THEN BECOMING MOSTLY
SUNNY.
* MAX TEMPERATURE.......66-71.
* 24 HR TREND.........4 DEGREES WARMER.
* MIN HUMIDITY..........40-45 PERCENT.
* 24 HR TREND.........5 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............WEST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...9 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
MONDAY NIGHT
PARTLY CLOUDY. LOWS 44 TO 49. SOUTHWEST WINDS
5 TO 15 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 70 TO 75. NORTH
WINDS 5 TO 15 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 47 TO 52. HIGHS 68 TO 73. EAST
WINDS 5 TO 10 MPH.
FRIDAY
PARTLY CLOUDY. ISOLATED SHOWERS. LOWS 47 TO 52. HIGHS
69 TO 74.
SATURDAY
PARTLY SUNNY. ISOLATED SHOWERS. HIGHS 61 TO 66.
MTZ129-272215-
CROW INDIAN RESERVATION/BIGHORN CANYON REC AREA-
117 AM MDT SUN SEP 27 2026
TODAY
* SKY/WEATHER...........PARTLY SUNNY.
* MAX TEMPERATURE.......58-68 AT 5000 FEET...54-60 AT 7000 FEET.
* 24 HR TREND.........7 DEGREES COOLER.
* MIN HUMIDITY..........32-42 PERCENT AT 5000 FEET...38-47 PERCENT
AT 7000 FEET.
* 24 HR TREND.........5 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...................ZERO.
TONIGHT
* SKY/WEATHER...........CLOUDY. ISOLATED RAIN SHOWERS IN THE
EVENING.
* MIN TEMPERATURE.......46-51.
* 24 HR TREND.........5 DEGREES WARMER.
* MAX HUMIDITY..........62-72 PERCENT AT 5000 FEET...59-68 PERCENT
AT 7000 FEET.
* 24 HR TREND.........23 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........SOUTHEAST WINDS 5 TO 15 MPH IN THE EVENING
SHIFTING TO THE WEST 5 TO 10 MPH OVERNIGHT.
* RIDGETOP.............SOUTHWEST 15 TO 25 MPH.
* CHANCE OF LIGHTNING...5 PERCENT.
* CWR...................ZERO.
MONDAY
* SKY/WEATHER...........MOSTLY CLOUDY. ISOLATED RAIN SHOWERS IN THE
AFTERNOON.
* MAX TEMPERATURE.......58-68 AT 5000 FEET...53-58 AT 7000 FEET.
* 24 HR TREND.........2 DEGREES COOLER.
* MIN HUMIDITY..........41-51 PERCENT AT 5000 FEET...52-62 PERCENT
AT 7000 FEET.
* 24 HR TREND.........8 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTHWEST WINDS 5 TO 15 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. ISOLATED SHOWERS. LOWS 43 TO 48.
SOUTHWEST WINDS 5 TO 10 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 47 TO 52. HIGHS 64 TO 74. SOUTHWEST
WINDS 5 TO 10 MPH.
WEDNESDAY
MOSTLY CLEAR. LOWS 45 TO 50. HIGHS 63 TO 73.
NORTHEAST WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 47 TO 53. HIGHS 62 TO 72.
SOUTHEAST WINDS 5 TO 10 MPH.
FRIDAY
PARTLY CLOUDY. LOWS 45 TO 51. HIGHS 63 TO 73.
SATURDAY
PARTLY SUNNY. ISOLATED SHOWERS. HIGHS 54 TO 64.
MTZ130-272215-
NORTHERN ROSEBUD/NORTHERN TREASURE COUNTIES-
117 AM MDT SUN SEP 27 2026
TODAY
* SKY/WEATHER...........PARTLY SUNNY.
* MAX TEMPERATURE.......64-69.
* 24 HR TREND.........7 DEGREES COOLER.
* MIN HUMIDITY..........28-33 PERCENT.
* 24 HR TREND.........5 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............EAST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...1 PERCENT.
* CWR...................ZERO.
TONIGHT
* 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.........44 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............NORTHEAST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...6 PERCENT.
* CWR...................ZERO.
MONDAY
* SKY/WEATHER...........MOSTLY CLOUDY. PATCHY FOG IN THE MORNING.
* MAX TEMPERATURE.......66-71.
* 24 HR TREND.........2 DEGREES WARMER.
* MIN HUMIDITY..........40-45 PERCENT.
* 24 HR TREND.........12 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............NORTHWEST WINDS 5 TO 15 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 71 TO 76. SOUTHWEST
WINDS 5 TO 10 MPH.
WEDNESDAY
MOSTLY CLEAR. LOWS 45 TO 50. HIGHS 69 TO 74. NORTH
WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 47 TO 52. HIGHS 67 TO 72.
SOUTHEAST WINDS 5 TO 10 MPH.
FRIDAY
PARTLY CLOUDY. LOWS 46 TO 51. HIGHS 68 TO 73.
SATURDAY
PARTLY SUNNY. ISOLATED SHOWERS. HIGHS 61 TO 66.
MTZ131-272215-
NORTHERN CHEYENNE INDIAN RESERVATION/ASHLAND RANGER DISTRICT
CUSTER NATL FOREST-
117 AM MDT SUN SEP 27 2026
TODAY
* SKY/WEATHER...........PARTLY SUNNY.
* MAX TEMPERATURE.......69-74.
* 24 HR TREND.........4 DEGREES COOLER.
* MIN HUMIDITY..........30-35 PERCENT.
* 24 HR TREND.........7 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........EAST WINDS 5 TO 15 MPH.
* RIDGETOP.............SOUTHWEST 10 TO 20 MPH.
* CHANCE OF LIGHTNING...1 PERCENT.
* CWR...................ZERO.
TONIGHT
* SKY/WEATHER...........MOSTLY CLOUDY WITH ISOLATED RAIN SHOWERS.
* MIN TEMPERATURE.......47-52.
* 24 HR TREND.........6 DEGREES WARMER.
* MAX HUMIDITY..........89-94 PERCENT.
* 24 HR TREND.........37 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........EAST WINDS 5 TO 15 MPH IN THE EVENING
SHIFTING TO THE NORTH 5 TO 10 MPH OVERNIGHT.
* RIDGETOP.............SOUTHWEST 15 TO 25 MPH.
* CHANCE OF LIGHTNING...9 PERCENT.
* CWR...................20 PERCENT.
MONDAY
* SKY/WEATHER...........CLOUDY IN THE MORNING THEN BECOMING PARTLY
SUNNY. PATCHY FOG IN THE MORNING.
* MAX TEMPERATURE.......67-72.
* 24 HR TREND.........2 DEGREES COOLER.
* MIN HUMIDITY..........38-43 PERCENT.
* 24 HR TREND.........8 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTHWEST WINDS 5 TO 15 MPH.
* RIDGETOP.............WEST 5 TO 15 MPH.
* CHANCE OF LIGHTNING...4 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
MONDAY NIGHT
MOSTLY CLOUDY. LOWS 42 TO 47. WEST WINDS 5 TO
10 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 45 TO 50. HIGHS 72 TO 77. SOUTHWEST
WINDS 5 TO 10 MPH.
WEDNESDAY
MOSTLY CLEAR. LOWS 44 TO 49. HIGHS 71 TO 76. NORTH
WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 46 TO 51. HIGHS 71 TO 76.
SOUTHEAST WINDS 5 TO 10 MPH.
FRIDAY
PARTLY CLOUDY. LOWS 45 TO 50. HIGHS 72 TO 77.
SATURDAY
PARTLY SUNNY. ISOLATED SHOWERS. HIGHS 64 TO 69.
MTZ132-272215-
CUSTER COUNTY-
117 AM MDT SUN SEP 27 2026
TODAY
* SKY/WEATHER...........MOSTLY SUNNY IN THE MORNING THEN BECOMING
MOSTLY CLOUDY.
* MAX TEMPERATURE.......64-69.
* 24 HR TREND.........4 DEGREES COOLER.
* MIN HUMIDITY..........25-30 PERCENT.
* 24 HR TREND.........1 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............EAST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...1 PERCENT.
* CWR...................ZERO.
TONIGHT
* SKY/WEATHER...........MOSTLY CLOUDY. ISOLATED RAIN SHOWERS IN THE
EVENING, THEN SCATTERED RAIN SHOWERS AND ISOLATED THUNDERSTORMS
OVERNIGHT. PATCHY FOG OVERNIGHT.
* MIN TEMPERATURE.......50-55.
* 24 HR TREND.........8 DEGREES WARMER.
* MAX HUMIDITY..........100 PERCENT.
* 24 HR TREND.........53 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............SOUTHEAST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...21 PERCENT.
* CWR...................30 PERCENT.
MONDAY
* SKY/WEATHER...........MOSTLY CLOUDY. PATCHY FOG IN THE MORNING.
* MAX TEMPERATURE.......65-70.
* 24 HR TREND.........1 DEGREE WARMER.
* MIN HUMIDITY..........58-63 PERCENT.
* 24 HR TREND.........33 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............SOUTHWEST WINDS 5 TO 10 MPH IN THE MORNING
SHIFTING TO THE NORTHWEST 5 TO 15 MPH IN THE AFTERNOON.
* CHANCE OF LIGHTNING...7 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
MONDAY NIGHT
PARTLY CLOUDY. LOWS 45 TO 50. WEST 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 44 TO 49. HIGHS 67 TO 72.
NORTHWEST WINDS 5 TO 15 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 47 TO 52. HIGHS 64 TO 69.
SOUTHEAST WINDS 5 TO 15 MPH.
FRIDAY
PARTLY CLOUDY. LOWS 46 TO 51. HIGHS 67 TO 72.
SATURDAY
PARTLY SUNNY. HIGHS 59 TO 64.
MTZ133-272215-
SIOUX RANGER DISTRICT CUSTER NATIONAL FOREST-
117 AM MDT SUN SEP 27 2026
TODAY
* SKY/WEATHER...........PARTLY SUNNY WITH ISOLATED RAIN SHOWERS.
* MAX TEMPERATURE.......66-71.
* 24 HR TREND.........6 DEGREES COOLER.
* MIN HUMIDITY..........30-35 PERCENT.
* 24 HR TREND.........7 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............EAST WINDS 10 TO 20 MPH. GUSTS UP TO 30 MPH
IN THE AFTERNOON.
* CHANCE OF LIGHTNING...7 PERCENT.
* CWR...................ZERO.
TONIGHT
* SKY/WEATHER...........MOSTLY CLOUDY. ISOLATED SHOWERS AND
THUNDERSTORMS IN THE EVENING, THEN NUMEROUS RAIN SHOWERS AND
ISOLATED THUNDERSTORMS OVERNIGHT.
* MIN TEMPERATURE.......51-56.
* 24 HR TREND.........6 DEGREES WARMER.
* MAX HUMIDITY..........100 PERCENT.
* 24 HR TREND.........43 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............SOUTHEAST WINDS 10 TO 20 MPH. GUSTS UP TO 30
MPH IN THE EVENING.
* CHANCE OF LIGHTNING...22 PERCENT.
* CWR...................50 PERCENT.
MONDAY
* SKY/WEATHER...........CLOUDY IN THE MORNING THEN BECOMING PARTLY
SUNNY. PATCHY FOG IN THE MORNING. ISOLATED RAIN SHOWERS.
* MAX TEMPERATURE.......71-76.
* 24 HR TREND.........5 DEGREES WARMER.
* MIN HUMIDITY..........57-62 PERCENT.
* 24 HR TREND.........27 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............SOUTH WINDS 5 TO 15 MPH IN THE MORNING
SHIFTING TO THE NORTHWEST IN THE AFTERNOON.
* CHANCE OF LIGHTNING...14 PERCENT.
* CWR...................10 PERCENT.
FORECAST DAYS 3 THROUGH 7...
MONDAY NIGHT
MOSTLY CLOUDY. PATCHY FOG. ISOLATED SHOWERS. LOWS
47 TO 52. NORTHWEST WINDS 5 TO 15 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 47 TO 52. HIGHS 71 TO 76. SOUTHWEST
WINDS 5 TO 15 MPH.
WEDNESDAY
MOSTLY CLEAR. LOWS 45 TO 50. HIGHS 71 TO 76.
NORTHWEST WINDS 5 TO 15 MPH WITH GUSTS TO AROUND 30 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 46 TO 51. HIGHS 65 TO 70.
SOUTHEAST WINDS 5 TO 15 MPH WITH GUSTS TO AROUND 30 MPH.
FRIDAY
PARTLY CLOUDY. LOWS 47 TO 52. HIGHS 69 TO 74.
SATURDAY
MOSTLY SUNNY. HIGHS 62 TO 67.
WYZ274-272215-
SHERIDAN COUNTY-
117 AM MDT SUN SEP 27 2026
TODAY
* SKY/WEATHER...........PARTLY SUNNY.
* MAX TEMPERATURE.......66-71.
* 24 HR TREND.........9 DEGREES COOLER.
* MIN HUMIDITY..........36-41 PERCENT.
* 24 HR TREND.........9 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........EAST WINDS 5 TO 10 MPH.
* RIDGETOP.............SOUTHWEST 10 TO 20 MPH.
* CHANCE OF LIGHTNING...4 PERCENT.
* CWR...................ZERO.
TONIGHT
* SKY/WEATHER...........MOSTLY CLOUDY. ISOLATED RAIN SHOWERS IN THE
EVENING.
* MIN TEMPERATURE.......44-49.
* 24 HR TREND.........5 DEGREES WARMER.
* MAX HUMIDITY..........78-83 PERCENT.
* 24 HR TREND.........2 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........SOUTH WINDS 5 TO 10 MPH IN THE EVENING
SHIFTING TO THE WEST OVERNIGHT.
* RIDGETOP.............SOUTHWEST 10 TO 20 MPH.
* CHANCE OF LIGHTNING...6 PERCENT.
* CWR...................ZERO.
MONDAY
* SKY/WEATHER...........MOSTLY CLOUDY. SCATTERED RAIN SHOWERS IN
THE AFTERNOON.
* MAX TEMPERATURE.......63-68.
* 24 HR TREND.........3 DEGREES COOLER.
* MIN HUMIDITY..........47-52 PERCENT.
* 24 HR TREND.........11 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTHWEST WINDS 5 TO 10 MPH.
* RIDGETOP.............WEST 5 TO 10 MPH.
* CHANCE OF LIGHTNING...12 PERCENT.
* CWR...................10 PERCENT.
FORECAST DAYS 3 THROUGH 7...
MONDAY NIGHT
PARTLY CLOUDY. PATCHY FOG. LOWS 39 TO 44. WEST
WINDS 5 TO 10 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 40 TO 45. HIGHS 70 TO 75. SOUTH
WINDS 5 TO 10 MPH.
WEDNESDAY
MOSTLY CLEAR. LOWS 42 TO 47. HIGHS 70 TO 75. NORTH
WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 42 TO 47. HIGHS 70 TO 75.
SOUTHEAST WINDS 5 TO 10 MPH.
FRIDAY
PARTLY CLOUDY. LOWS 42 TO 47. HIGHS 71 TO 76.
SATURDAY
MOSTLY SUNNY. SCATTERED SHOWERS. HIGHS 62 TO 67.
WYZ284-272215-
BIGHORN NATIONAL FOREST-
117 AM MDT SUN SEP 27 2026
TODAY
* SKY/WEATHER...........PARTLY SUNNY. ISOLATED RAIN SHOWERS IN THE
MORNING.
* MAX TEMPERATURE.......57-62.
* 24 HR TREND.........3 DEGREES COOLER.
* MIN HUMIDITY..........35-40 PERCENT.
* 24 HR TREND.........11 PERCENT WETTER.
* WIND (20 FT)
* AT BURGESS JCT.......SOUTH WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...3 PERCENT.
* CWR...................ZERO.
TONIGHT
* SKY/WEATHER...........MOSTLY CLOUDY. SCATTERED RAIN SHOWERS IN
THE EVENING.
* MIN TEMPERATURE.......38-43.
* 24 HR TREND.........4 DEGREES WARMER.
* MAX HUMIDITY..........80-85 PERCENT.
* 24 HR TREND.........4 PERCENT WETTER.
* WIND (20 FT)
* AT BURGESS JCT.......SOUTHWEST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...6 PERCENT.
* CWR...................20 PERCENT.
MONDAY
* SKY/WEATHER...........MOSTLY CLOUDY. ISOLATED RAIN SHOWERS IN THE
MORNING, THEN SCATTERED RAIN SHOWERS IN THE AFTERNOON.
* MAX TEMPERATURE.......53-58.
* 24 HR TREND.........4 DEGREES COOLER.
* MIN HUMIDITY..........53-58 PERCENT.
* 24 HR TREND.........18 PERCENT WETTER.
* WIND (20 FT)
* AT BURGESS JCT.......WEST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...14 PERCENT.
* CWR...................20 PERCENT.
FORECAST DAYS 3 THROUGH 7...
MONDAY NIGHT
COLDER. MOSTLY CLOUDY. PATCHY FOG. ISOLATED
SHOWERS. LOWS 30 TO 35. WEST WINDS 5 TO 10 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 34 TO 39. HIGHS 56 TO 61. WEST
WINDS 5 TO 15 MPH.
WEDNESDAY
MOSTLY CLEAR. LOWS 33 TO 38. HIGHS 57 TO 62.
NORTHWEST WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 36 TO 41. HIGHS 57 TO 62.
SOUTHWEST WINDS 5 TO 15 MPH.
FRIDAY
PARTLY CLOUDY. LOWS 34 TO 39. HIGHS 59 TO 64.
SATURDAY
PARTLY SUNNY. SCATTERED SHOWERS AND SNOW SHOWERS.
HIGHS 50 TO 55.
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