463
FNUS55 KBYZ 171959
FWFBYZ
FIRE WEATHER PLANNING FORECAST FOR SCEN AND SERN MONTANA
NATIONAL WEATHER SERVICE BILLINGS MT
159 PM MDT WED SEP 17 2025
DISCUSSION
TEMPERATURES START TO WARM OVER WESTERN ZONES THURSDAY WITH COOLER
AND WETTER CONDITIONS PERSISTING FOR CARTER AND FALLON COUNTIES.
STARTING FRIDAY, A WARMER AND DRIER PATTERN TAKES HOLD WITH MOST
LOCATIONS SEEING HIGH TEMPERATURES IN THE 80S F AND MINIMUM
RELATIVE HUMIDITY VALUES GENERALLY IN THE 20S%. A WEAK COLD FRONT
MONDAY BRINGS 10-20% PRECIPITATION CHANCES AND WINDS GUSTING INTO
THE 20S MPH. TORGERSON
MTZ123-181015-
GALLATIN NATIONAL FOREST-
159 PM MDT WED SEP 17 2025
TONIGHT
* SKY/WEATHER...........MOSTLY CLEAR.
* MIN TEMPERATURE.......40-50 AT 5000 FEET...35-45 AT 7000 FEET.
* 24 HR TREND.........3 DEGREES WARMER.
* MAX HUMIDITY..........76-86 PERCENT AT 5000 FEET...72-82 PERCENT
AT 7000 FEET.
* 24 HR TREND.........35 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........SOUTHEAST WINDS 5 TO 10 MPH.
* RIDGETOP.............NORTHWEST 5 TO 10 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
THURSDAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......72-82 AT 5000 FEET...59-69 AT 7000 FEET.
* 24 HR TREND.........6 DEGREES WARMER.
* MIN HUMIDITY..........24-34 PERCENT AT 5000 FEET...26-36 PERCENT
AT 7000 FEET.
* 24 HR TREND.........16 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........SOUTHEAST WINDS 5 TO 10 MPH IN THE MORNING
SHIFTING TO THE NORTHWEST IN THE AFTERNOON.
* RIDGETOP.............WEST 5 TO 15 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
THURSDAY NIGHT
* SKY/WEATHER...........MOSTLY CLEAR.
* MIN TEMPERATURE.......41-51 AT 5000 FEET...38-48 AT 7000 FEET.
* 24 HR TREND.........4 DEGREES WARMER.
* MAX HUMIDITY..........46-51 PERCENT.
* 24 HR TREND.........17 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........SOUTH WINDS 5 TO 10 MPH.
* RIDGETOP.............NORTHWEST 5 TO 10 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
FRIDAY
* SKY/WEATHER...........MOSTLY SUNNY.
* MAX TEMPERATURE.......72-82 AT 5000 FEET...60-70 AT 7000 FEET.
* 24 HR TREND.........1 DEGREE WARMER.
* MIN HUMIDITY..........24-29 PERCENT.
* 24 HR TREND.........1 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........SOUTH WINDS 5 TO 10 MPH IN THE MORNING
SHIFTING TO THE NORTHWEST IN THE AFTERNOON.
* RIDGETOP.............WEST 5 TO 10 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
FRIDAY NIGHT
MOSTLY CLOUDY. LOWS 43 TO 53. SOUTH WINDS 5 TO
10 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 46 TO 56. HIGHS 74 TO 82.
SOUTHWEST WINDS 5 TO 10 MPH.
SUNDAY
PARTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS. LOWS
41 TO 51. HIGHS 71 TO 79. SOUTHWEST WINDS 5 TO 15 MPH.
MONDAY
MOSTLY CLEAR. LOWS 44 TO 54. HIGHS 69 TO 78. SOUTHWEST
WINDS 5 TO 10 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 47 TO 57. HIGHS 76 TO 84.
WEDNESDAY
SUNNY. HIGHS 74 TO 83.
MTZ124-181015-
WHEATLAND COUNTY/SWEET GRASS COUNTY-
159 PM MDT WED SEP 17 2025
TONIGHT
* SKY/WEATHER...........MOSTLY CLEAR. PATCHY FOG OVERNIGHT.
* MIN TEMPERATURE.......41-46.
* 24 HR TREND.........1 DEGREE COOLER.
* MAX HUMIDITY..........89-94 PERCENT.
* 24 HR TREND.........5 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............SOUTH WINDS 5 TO 10 MPH IN THE EVENING
SHIFTING TO THE WEST OVERNIGHT.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
THURSDAY
* SKY/WEATHER...........SUNNY. PATCHY FOG IN THE MORNING.
* MAX TEMPERATURE.......74-79.
* 24 HR TREND.........4 DEGREES WARMER.
* MIN HUMIDITY..........29-34 PERCENT.
* 24 HR TREND.........10 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............WEST WINDS 5 TO 10 MPH IN THE MORNING
SHIFTING TO THE SOUTHEAST IN THE AFTERNOON.
* CHANCE OF LIGHTNING...3 PERCENT.
* CWR...................ZERO.
THURSDAY NIGHT
* SKY/WEATHER...........MOSTLY CLEAR.
* MIN TEMPERATURE.......41-46.
* 24 HR TREND.........UNCHANGED.
* MAX HUMIDITY..........84-89 PERCENT.
* 24 HR TREND.........5 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............NORTHEAST WINDS 5 TO 15 MPH IN THE EVENING
SHIFTING TO THE WEST 5 TO 10 MPH OVERNIGHT.
* CHANCE OF LIGHTNING...1 PERCENT.
* CWR...................ZERO.
FRIDAY
* SKY/WEATHER...........MOSTLY SUNNY.
* MAX TEMPERATURE.......74-79.
* 24 HR TREND.........UNCHANGED.
* MIN HUMIDITY..........24-29 PERCENT.
* 24 HR TREND.........5 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............WEST WINDS 5 TO 10 MPH IN THE MORNING
SHIFTING TO THE SOUTHEAST IN THE AFTERNOON.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
FRIDAY NIGHT
PARTLY CLOUDY. LOWS 43 TO 48. SOUTH WINDS 5 TO
15 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 46 TO 51. HIGHS 80 TO 85. WEST
WINDS 5 TO 15 MPH.
SUNDAY
PARTLY CLOUDY. ISOLATED SHOWERS. LOWS 43 TO 48. HIGHS
76 TO 81. WEST WINDS 15 TO 25 MPH WITH GUSTS TO AROUND 30 MPH.
MONDAY
MOSTLY CLEAR. LOWS 44 TO 49. HIGHS 74 TO 79. WEST WINDS
10 TO 20 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 46 TO 51. HIGHS 80 TO 85.
WEDNESDAY
MOSTLY SUNNY. HIGHS 79 TO 84.
MTZ125-181015-
STILLWATER COUNTY-
159 PM MDT WED SEP 17 2025
TONIGHT
* SKY/WEATHER...........MOSTLY CLEAR.
* MIN TEMPERATURE.......44-49.
* 24 HR TREND.........1 DEGREE COOLER.
* MAX HUMIDITY..........72-77 PERCENT.
* 24 HR TREND.........19 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............SOUTHWEST WINDS 5 TO 10 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
THURSDAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......75-80.
* 24 HR TREND.........6 DEGREES WARMER.
* MIN HUMIDITY..........29-34 PERCENT.
* 24 HR TREND.........13 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............SOUTHWEST WINDS 5 TO 10 MPH IN THE MORNING
SHIFTING TO THE EAST IN THE AFTERNOON.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
THURSDAY NIGHT
* SKY/WEATHER...........MOSTLY CLEAR.
* MIN TEMPERATURE.......45-50.
* 24 HR TREND.........1 DEGREE WARMER.
* MAX HUMIDITY..........62-67 PERCENT.
* 24 HR TREND.........10 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............SOUTHWEST WINDS 5 TO 10 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
FRIDAY
* SKY/WEATHER...........MOSTLY SUNNY.
* MAX TEMPERATURE.......75-80.
* 24 HR TREND.........UNCHANGED.
* MIN HUMIDITY..........27-32 PERCENT.
* 24 HR TREND.........2 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............SOUTHWEST WINDS 5 TO 10 MPH IN THE MORNING
SHIFTING TO THE EAST IN THE AFTERNOON.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
FRIDAY NIGHT
MOSTLY CLOUDY. LOWS 48 TO 53. SOUTHWEST WINDS
5 TO 10 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 51 TO 56. HIGHS 81 TO 86. WEST
WINDS 5 TO 10 MPH.
SUNDAY
PARTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS. LOWS 46 TO 51. HIGHS 80 TO 85. WEST WINDS 5 TO
15 MPH.
MONDAY
MOSTLY CLEAR. LOWS 47 TO 52. HIGHS 75 TO 80. SOUTHWEST
WINDS 5 TO 10 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 51 TO 56. HIGHS 80 TO 85.
WEDNESDAY
MOSTLY SUNNY. HIGHS 81 TO 86.
MTZ126-181015-
BEARTOOTH RANGER DISTRICT CUSTER NATIONAL FOREST-
159 PM MDT WED SEP 17 2025
TONIGHT
* SKY/WEATHER...........MOSTLY CLEAR.
* MIN TEMPERATURE.......46-52 AT 5000 FEET...38-48 AT 7000 FEET.
* 24 HR TREND.........4 DEGREES WARMER.
* MAX HUMIDITY..........71-76 PERCENT.
* 24 HR TREND.........27 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........WEST WINDS 5 TO 10 MPH.
* RIDGETOP.............NORTHWEST 5 TO 10 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
THURSDAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......66-76 AT 5000 FEET...60-70 AT 7000 FEET.
* 24 HR TREND.........6 DEGREES WARMER.
* MIN HUMIDITY..........30-40 PERCENT AT 5000 FEET...35-45 PERCENT
AT 7000 FEET.
* 24 HR TREND.........19 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTHWEST WINDS 5 TO 10 MPH IN THE MORNING
SHIFTING TO THE EAST IN THE AFTERNOON.
* RIDGETOP.............WEST 5 TO 10 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
THURSDAY NIGHT
* SKY/WEATHER...........MOSTLY CLEAR.
* MIN TEMPERATURE.......46-54 AT 5000 FEET...41-51 AT 7000 FEET.
* 24 HR TREND.........2 DEGREES WARMER.
* MAX HUMIDITY..........51-61 PERCENT AT 5000 FEET...49-59 PERCENT
AT 7000 FEET.
* 24 HR TREND.........19 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........SOUTHWEST WINDS 5 TO 15 MPH.
* RIDGETOP.............NORTHWEST 5 TO 15 MPH.
* CHANCE OF LIGHTNING...1 PERCENT.
* CWR...................ZERO.
FRIDAY
* SKY/WEATHER...........MOSTLY SUNNY.
* MAX TEMPERATURE.......68-77 AT 5000 FEET...61-71 AT 7000 FEET.
* 24 HR TREND.........2 DEGREES WARMER.
* MIN HUMIDITY..........26-36 PERCENT AT 5000 FEET...30-40 PERCENT
AT 7000 FEET.
* 24 HR TREND.........6 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........WEST WINDS 5 TO 10 MPH IN THE MORNING
SHIFTING TO THE EAST IN THE AFTERNOON.
* RIDGETOP.............WEST 5 TO 10 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
FRIDAY NIGHT
MOSTLY CLOUDY. LOWS 50 TO 57. SOUTHWEST WINDS
5 TO 15 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 52 TO 59. HIGHS 72 TO 82. WEST
WINDS 5 TO 15 MPH.
SUNDAY
MOSTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS. LOWS 47 TO 53. HIGHS 72 TO 81. WEST WINDS 5 TO
15 MPH.
MONDAY
MOSTLY CLEAR. LOWS 49 TO 56. HIGHS 66 TO 76. SOUTHWEST
WINDS 5 TO 15 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 53 TO 60. HIGHS 73 TO 82.
WEDNESDAY
MOSTLY SUNNY. HIGHS 75 TO 84.
MTZ127-181015-
GOLDEN VALLEY COUNTY/MUSSELSHELL COUNTY-
159 PM MDT WED SEP 17 2025
TONIGHT
* SKY/WEATHER...........MOSTLY CLEAR.
* MIN TEMPERATURE.......51-56.
* 24 HR TREND.........4 DEGREES WARMER.
* MAX HUMIDITY..........71-76 PERCENT.
* 24 HR TREND.........20 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............LIGHT WINDS.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
THURSDAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......71-76.
* 24 HR TREND.........2 DEGREES WARMER.
* MIN HUMIDITY..........38-43 PERCENT.
* 24 HR TREND.........9 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............SOUTH WINDS 5 TO 10 MPH.
* CHANCE OF LIGHTNING...4 PERCENT.
* CWR...................ZERO.
THURSDAY NIGHT
* SKY/WEATHER...........MOSTLY CLEAR.
* MIN TEMPERATURE.......48-53.
* 24 HR TREND.........3 DEGREES COOLER.
* MAX HUMIDITY..........74-79 PERCENT.
* 24 HR TREND.........3 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............EAST WINDS 5 TO 10 MPH.
* CHANCE OF LIGHTNING...7 PERCENT.
* CWR...................ZERO.
FRIDAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......71-76.
* 24 HR TREND.........UNCHANGED.
* MIN HUMIDITY..........35-40 PERCENT.
* 24 HR TREND.........3 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............LIGHT WINDS IN THE MORNING BECOMING SOUTH 5
TO 10 MPH IN THE AFTERNOON.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
FRIDAY NIGHT
PARTLY CLOUDY. LOWS 51 TO 56. SOUTHEAST WINDS
5 TO 10 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 55 TO 60. HIGHS 78 TO 83. WEST
WINDS 5 TO 10 MPH.
SUNDAY
PARTLY CLOUDY. ISOLATED SHOWERS. LOWS 50 TO 55. HIGHS
78 TO 83. WEST WINDS 5 TO 15 MPH.
MONDAY
MOSTLY CLEAR. LOWS 51 TO 56. HIGHS 73 TO 78. WEST WINDS
5 TO 10 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 54 TO 59. HIGHS 78 TO 83.
WEDNESDAY
SUNNY. HIGHS 79 TO 84.
MTZ128-181015-
YELLOWSTONE COUNTY-
159 PM MDT WED SEP 17 2025
TONIGHT
* SKY/WEATHER...........MOSTLY CLEAR.
* MIN TEMPERATURE.......48-53.
* 24 HR TREND.........1 DEGREE COOLER.
* MAX HUMIDITY..........81-86 PERCENT.
* 24 HR TREND.........13 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............SOUTHEAST WINDS 5 TO 10 MPH IN THE EVENING
SHIFTING TO THE SOUTHWEST OVERNIGHT.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
THURSDAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......75-80.
* 24 HR TREND.........4 DEGREES WARMER.
* MIN HUMIDITY..........34-39 PERCENT.
* 24 HR TREND.........14 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............SOUTHWEST WINDS 5 TO 10 MPH IN THE MORNING
SHIFTING TO THE SOUTHEAST IN THE AFTERNOON.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
THURSDAY NIGHT
* SKY/WEATHER...........PARTLY CLOUDY.
* MIN TEMPERATURE.......47-52.
* 24 HR TREND.........1 DEGREE COOLER.
* MAX HUMIDITY..........78-83 PERCENT.
* 24 HR TREND.........3 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............NORTHEAST WINDS 5 TO 10 MPH.
* CHANCE OF LIGHTNING...3 PERCENT.
* CWR...................ZERO.
FRIDAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......75-80.
* 24 HR TREND.........UNCHANGED.
* MIN HUMIDITY..........34-39 PERCENT.
* 24 HR TREND.........UNCHANGED.
* WIND (20 FT)
* PLAINS...............SOUTHWEST WINDS 5 TO 10 MPH IN THE MORNING
SHIFTING TO THE SOUTHEAST IN THE AFTERNOON.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
FRIDAY NIGHT
PARTLY CLOUDY. LOWS 50 TO 55. SOUTHEAST WINDS
5 TO 10 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 53 TO 58. HIGHS 82 TO 87. WEST
WINDS 5 TO 10 MPH.
SUNDAY
PARTLY CLOUDY. ISOLATED SHOWERS. LOWS 50 TO 55. HIGHS
82 TO 87. WEST WINDS 5 TO 15 MPH.
MONDAY
MOSTLY CLEAR. LOWS 49 TO 54. HIGHS 77 TO 82. WEST WINDS
5 TO 15 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 52 TO 57. HIGHS 82 TO 87.
WEDNESDAY
SUNNY. HIGHS 83 TO 88.
MTZ129-181015-
CROW INDIAN RESERVATION/BIGHORN CANYON REC AREA-
159 PM MDT WED SEP 17 2025
TONIGHT
* SKY/WEATHER...........MOSTLY CLEAR.
* MIN TEMPERATURE.......46-52 AT 5000 FEET...43-48 AT 7000 FEET.
* 24 HR TREND.........2 DEGREES WARMER.
* MAX HUMIDITY..........78-83 PERCENT.
* 24 HR TREND.........20 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........SOUTH WINDS 5 TO 10 MPH.
* RIDGETOP.............NORTHWEST 5 TO 10 MPH.
* CHANCE OF LIGHTNING...11 PERCENT.
* CWR...................ZERO.
THURSDAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......67-77 AT 5000 FEET...58-66 AT 7000 FEET.
* 24 HR TREND.........5 DEGREES WARMER.
* MIN HUMIDITY..........31-41 PERCENT AT 5000 FEET...41-51 PERCENT
AT 7000 FEET.
* 24 HR TREND.........24 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........SOUTHEAST WINDS 5 TO 10 MPH.
* RIDGETOP.............WEST 5 TO 10 MPH.
* CHANCE OF LIGHTNING...2 PERCENT.
* CWR...................ZERO.
THURSDAY NIGHT
* SKY/WEATHER...........MOSTLY CLEAR.
* MIN TEMPERATURE.......47-52.
* 24 HR TREND.........UNCHANGED.
* MAX HUMIDITY..........57-67 PERCENT AT 5000 FEET...49-56 PERCENT
AT 7000 FEET.
* 24 HR TREND.........11 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........SOUTHEAST WINDS 5 TO 10 MPH.
* RIDGETOP.............WEST 5 TO 15 MPH.
* CHANCE OF LIGHTNING...8 PERCENT.
* CWR...................ZERO.
FRIDAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......67-77 AT 5000 FEET...61-67 AT 7000 FEET.
* 24 HR TREND.........1 DEGREE WARMER.
* MIN HUMIDITY..........27-37 PERCENT AT 5000 FEET...34-43 PERCENT
AT 7000 FEET.
* 24 HR TREND.........4 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........SOUTHWEST WINDS 5 TO 10 MPH IN THE MORNING
SHIFTING TO THE NORTHWEST IN THE AFTERNOON.
* RIDGETOP.............NORTHWEST 10 TO 20 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
FRIDAY NIGHT
PARTLY CLOUDY. LOWS 50 TO 57. SOUTHEAST WINDS
5 TO 10 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 53 TO 59. HIGHS 72 TO 82.
SOUTHWEST WINDS 5 TO 10 MPH.
SUNDAY
PARTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS. LOWS 48 TO 53. HIGHS 72 TO 82. WEST WINDS 5 TO
15 MPH.
MONDAY
MOSTLY CLEAR. LOWS 49 TO 56. HIGHS 67 TO 77. WEST WINDS
5 TO 15 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 51 TO 60. HIGHS 73 TO 83.
WEDNESDAY
SUNNY. HIGHS 75 TO 85.
MTZ130-181015-
NORTHERN ROSEBUD/NORTHERN TREASURE COUNTIES-
159 PM MDT WED SEP 17 2025
TONIGHT
* SKY/WEATHER...........MOSTLY CLEAR.
* MIN TEMPERATURE.......48-53.
* 24 HR TREND.........4 DEGREES COOLER.
* MAX HUMIDITY..........89-94 PERCENT.
* 24 HR TREND.........1 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............EAST WINDS 5 TO 10 MPH IN THE EVENING
BECOMING LIGHT OVERNIGHT.
* CHANCE OF LIGHTNING...6 PERCENT.
* CWR...................ZERO.
THURSDAY
* SKY/WEATHER...........SUNNY. PATCHY FOG IN THE MORNING.
* MAX TEMPERATURE.......73-78.
* 24 HR TREND.........1 DEGREE COOLER.
* MIN HUMIDITY..........37-42 PERCENT.
* 24 HR TREND.........5 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............EAST WINDS 5 TO 10 MPH.
* CHANCE OF LIGHTNING...3 PERCENT.
* CWR...................ZERO.
THURSDAY NIGHT
* SKY/WEATHER...........PARTLY CLOUDY. ISOLATED SHOWERS AND
THUNDERSTORMS IN THE EVENING, THEN ISOLATED RAIN SHOWERS
OVERNIGHT.
* MIN TEMPERATURE.......47-52.
* 24 HR TREND.........1 DEGREE COOLER.
* MAX HUMIDITY..........91-96 PERCENT.
* 24 HR TREND.........2 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............EAST WINDS 5 TO 10 MPH.
* CHANCE OF LIGHTNING...17 PERCENT.
* CWR...................10 PERCENT.
FRIDAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......73-78.
* 24 HR TREND.........UNCHANGED.
* MIN HUMIDITY..........34-39 PERCENT.
* 24 HR TREND.........3 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............EAST WINDS 5 TO 10 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
FRIDAY NIGHT
PARTLY CLOUDY. LOWS 48 TO 53. SOUTHEAST WINDS
5 TO 10 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 53 TO 58. HIGHS 81 TO 86.
SOUTHWEST WINDS 5 TO 10 MPH.
SUNDAY
PARTLY CLOUDY. SCATTERED SHOWERS. LOWS 50 TO 55. HIGHS
82 TO 87. WEST WINDS 5 TO 15 MPH.
MONDAY
MOSTLY CLEAR. LOWS 48 TO 53. HIGHS 75 TO 80. WEST WINDS
5 TO 10 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 51 TO 56. HIGHS 81 TO 86.
WEDNESDAY
SUNNY. HIGHS 83 TO 88.
MTZ131-181015-
NORTHERN CHEYENNE INDIAN RESERVATION/ASHLAND RANGER DISTRICT
CUSTER NATL FOREST-
159 PM MDT WED SEP 17 2025
TONIGHT
* SKY/WEATHER...........PARTLY CLOUDY. SCATTERED RAIN SHOWERS AND
ISOLATED THUNDERSTORMS IN THE EVENING. PATCHY FOG OVERNIGHT.
* MIN TEMPERATURE.......44-49.
* 24 HR TREND.........4 DEGREES COOLER.
* MAX HUMIDITY..........94-99 PERCENT.
* 24 HR TREND.........UNCHANGED.
* WIND (20 FT)
* SLOPE/VALLEY.........WEST WINDS 5 TO 10 MPH IN THE EVENING
BECOMING LIGHT OVERNIGHT.
* RIDGETOP.............NORTH 5 TO 10 MPH.
* CHANCE OF LIGHTNING...18 PERCENT.
* CWR...................LESS THAN 10 PERCENT.
THURSDAY
* SKY/WEATHER...........SUNNY. PATCHY FOG IN THE MORNING.
* MAX TEMPERATURE.......70-75.
* 24 HR TREND.........3 DEGREES WARMER.
* MIN HUMIDITY..........38-43 PERCENT.
* 24 HR TREND.........18 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........SOUTH WINDS 5 TO 10 MPH IN THE MORNING
SHIFTING TO THE EAST IN THE AFTERNOON.
* RIDGETOP.............WEST 5 TO 10 MPH.
* CHANCE OF LIGHTNING...2 PERCENT.
* CWR...................ZERO.
THURSDAY NIGHT
* SKY/WEATHER...........MOSTLY CLEAR.
* MIN TEMPERATURE.......42-47.
* 24 HR TREND.........2 DEGREES COOLER.
* MAX HUMIDITY..........88-93 PERCENT.
* 24 HR TREND.........6 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........SOUTHEAST WINDS 5 TO 10 MPH.
* RIDGETOP.............WEST 10 TO 20 MPH.
* CHANCE OF LIGHTNING...9 PERCENT.
* CWR...................ZERO.
FRIDAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......73-78.
* 24 HR TREND.........3 DEGREES WARMER.
* MIN HUMIDITY..........32-37 PERCENT.
* 24 HR TREND.........6 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........SOUTH WINDS 5 TO 10 MPH IN THE MORNING
SHIFTING TO THE NORTH IN THE AFTERNOON.
* RIDGETOP.............NORTHWEST 10 TO 20 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
FRIDAY NIGHT
PARTLY CLOUDY. LOWS 46 TO 51. SOUTHEAST WINDS
5 TO 10 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 49 TO 54. HIGHS 80 TO 85.
SOUTHWEST WINDS 5 TO 10 MPH.
SUNDAY
MOSTLY CLEAR. ISOLATED SHOWERS. LOWS 47 TO 52. HIGHS
81 TO 86. NORTHWEST WINDS 5 TO 10 MPH.
MONDAY
MOSTLY CLEAR. LOWS 45 TO 50. HIGHS 73 TO 78. WEST WINDS
5 TO 10 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 49 TO 54. HIGHS 81 TO 86.
WEDNESDAY
SUNNY. HIGHS 84 TO 89.
MTZ132-181015-
CUSTER COUNTY-
159 PM MDT WED SEP 17 2025
TONIGHT
* SKY/WEATHER...........PARTLY CLOUDY. SCATTERED RAIN SHOWERS AND
ISOLATED THUNDERSTORMS IN THE EVENING.
* MIN TEMPERATURE.......49-54.
* 24 HR TREND.........4 DEGREES COOLER.
* MAX HUMIDITY..........100 PERCENT.
* 24 HR TREND.........16 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............SOUTHEAST WINDS 5 TO 10 MPH.
* CHANCE OF LIGHTNING...15 PERCENT.
* CWR...................20 PERCENT.
THURSDAY
* SKY/WEATHER...........PARTLY SUNNY IN THE MORNING THEN CLEARING.
* MAX TEMPERATURE.......66-71.
* 24 HR TREND.........2 DEGREES COOLER.
* MIN HUMIDITY..........53-58 PERCENT.
* 24 HR TREND.........2 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............EAST WINDS 5 TO 10 MPH.
* CHANCE OF LIGHTNING...4 PERCENT.
* CWR...................ZERO.
THURSDAY NIGHT
* SKY/WEATHER...........PARTLY CLOUDY.
* MIN TEMPERATURE.......46-51.
* 24 HR TREND.........3 DEGREES COOLER.
* MAX HUMIDITY..........100 PERCENT.
* 24 HR TREND.........UNCHANGED.
* WIND (20 FT)
* PLAINS...............EAST WINDS 5 TO 10 MPH.
* CHANCE OF LIGHTNING...5 PERCENT.
* CWR...................ZERO.
FRIDAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......68-73.
* 24 HR TREND.........2 DEGREES WARMER.
* MIN HUMIDITY..........40-45 PERCENT.
* 24 HR TREND.........13 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............SOUTHEAST WINDS 5 TO 10 MPH IN THE MORNING
SHIFTING TO THE SOUTHWEST IN THE AFTERNOON.
* CHANCE OF LIGHTNING...1 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
FRIDAY NIGHT
PARTLY CLOUDY. LOWS 47 TO 52. SOUTHEAST WINDS
5 TO 10 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 52 TO 57. HIGHS 76 TO 81.
SOUTHWEST WINDS 5 TO 10 MPH.
SUNDAY
MOSTLY CLEAR. ISOLATED SHOWERS. LOWS 50 TO 55. HIGHS
79 TO 84. WEST WINDS 5 TO 15 MPH.
MONDAY
MOSTLY CLEAR. LOWS 48 TO 53. HIGHS 71 TO 76. WEST WINDS
5 TO 15 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 51 TO 56. HIGHS 77 TO 82.
WEDNESDAY
SUNNY. HIGHS 81 TO 86.
MTZ133-181015-
SIOUX RANGER DISTRICT CUSTER NATIONAL FOREST-
159 PM MDT WED SEP 17 2025
TONIGHT
* SKY/WEATHER...........MOSTLY CLOUDY. SCATTERED RAIN SHOWERS AND
ISOLATED THUNDERSTORMS IN THE EVENING, THEN SCATTERED RAIN
SHOWERS OVERNIGHT.
* MIN TEMPERATURE.......49-54.
* 24 HR TREND.........4 DEGREES COOLER.
* MAX HUMIDITY..........100 PERCENT.
* 24 HR TREND.........13 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............NORTH WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...23 PERCENT.
* CWR...................10 PERCENT.
THURSDAY
* SKY/WEATHER...........MOSTLY CLOUDY WITH SCATTERED RAIN SHOWERS
IN THE MORNING, THEN MOSTLY SUNNY IN THE AFTERNOON.
* MAX TEMPERATURE.......64-69.
* 24 HR TREND.........UNCHANGED.
* MIN HUMIDITY..........75-80 PERCENT.
* 24 HR TREND.........1 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............NORTHEAST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...6 PERCENT.
* CWR...................10 PERCENT.
THURSDAY NIGHT
* SKY/WEATHER...........PARTLY CLOUDY. ISOLATED RAIN SHOWERS
OVERNIGHT.
* MIN TEMPERATURE.......45-50.
* 24 HR TREND.........4 DEGREES COOLER.
* MAX HUMIDITY..........100 PERCENT.
* 24 HR TREND.........UNCHANGED.
* WIND (20 FT)
* PLAINS...............SOUTHEAST WINDS 5 TO 10 MPH.
* CHANCE OF LIGHTNING...5 PERCENT.
* CWR...................ZERO.
FRIDAY
* SKY/WEATHER...........PARTLY SUNNY IN THE MORNING THEN CLEARING.
* MAX TEMPERATURE.......68-73.
* 24 HR TREND.........4 DEGREES WARMER.
* MIN HUMIDITY..........50-55 PERCENT.
* 24 HR TREND.........25 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............SOUTHWEST WINDS 5 TO 10 MPH.
* CHANCE OF LIGHTNING...2 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
FRIDAY NIGHT
PARTLY CLOUDY. LOWS 46 TO 51. SOUTHEAST WINDS
5 TO 10 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 50 TO 55. HIGHS 76 TO 81.
SOUTHWEST WINDS 5 TO 10 MPH.
SUNDAY
MOSTLY CLEAR. ISOLATED SHOWERS. LOWS 51 TO 56. HIGHS
80 TO 85. NORTHWEST WINDS 5 TO 15 MPH.
MONDAY
MOSTLY CLEAR. LOWS 47 TO 52. HIGHS 71 TO 76. WEST WINDS
5 TO 15 MPH.
TUESDAY
CLEAR. LOWS 49 TO 54. HIGHS 77 TO 82.
WEDNESDAY
SUNNY. HIGHS 79 TO 84.
WYZ274-181015-
SHERIDAN COUNTY-
159 PM MDT WED SEP 17 2025
TONIGHT
* SKY/WEATHER...........MOSTLY CLEAR. PATCHY FOG OVERNIGHT.
* MIN TEMPERATURE.......39-44.
* 24 HR TREND.........4 DEGREES COOLER.
* MAX HUMIDITY..........100 PERCENT.
* 24 HR TREND.........20 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........SOUTHWEST WINDS 5 TO 10 MPH.
* RIDGETOP.............NORTHWEST 5 TO 10 MPH.
* CHANCE OF LIGHTNING...13 PERCENT.
* CWR...................ZERO.
THURSDAY
* SKY/WEATHER...........SUNNY. PATCHY FOG IN THE MORNING.
* MAX TEMPERATURE.......72-77.
* 24 HR TREND.........7 DEGREES WARMER.
* MIN HUMIDITY..........37-42 PERCENT.
* 24 HR TREND.........23 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........LIGHT WINDS IN THE MORNING BECOMING EAST 5
TO 10 MPH IN THE AFTERNOON.
* RIDGETOP.............WEST 5 TO 10 MPH.
* CHANCE OF LIGHTNING...2 PERCENT.
* CWR...................ZERO.
THURSDAY NIGHT
* SKY/WEATHER...........MOSTLY CLEAR.
* MIN TEMPERATURE.......41-46.
* 24 HR TREND.........2 DEGREES WARMER.
* MAX HUMIDITY..........85-90 PERCENT.
* 24 HR TREND.........13 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........SOUTHEAST WINDS 5 TO 10 MPH IN THE EVENING
BECOMING LIGHT OVERNIGHT.
* RIDGETOP.............WEST 5 TO 15 MPH.
* CHANCE OF LIGHTNING...6 PERCENT.
* CWR...................ZERO.
FRIDAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......74-79.
* 24 HR TREND.........2 DEGREES WARMER.
* MIN HUMIDITY..........31-36 PERCENT.
* 24 HR TREND.........6 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........LIGHT WINDS IN THE MORNING BECOMING NORTH 5
TO 10 MPH IN THE AFTERNOON.
* RIDGETOP.............NORTHWEST 10 TO 20 MPH.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
FRIDAY NIGHT
MOSTLY CLOUDY. LOWS 44 TO 49. SOUTH WINDS 5 TO
10 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 47 TO 52. HIGHS 79 TO 84. WEST
WINDS 5 TO 10 MPH.
SUNDAY
PARTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS. LOWS 44 TO 49. HIGHS 80 TO 85. NORTHWEST WINDS
5 TO 10 MPH.
MONDAY
MOSTLY CLEAR. LOWS 44 TO 49. HIGHS 73 TO 78. NORTHWEST
WINDS 5 TO 10 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 46 TO 51. HIGHS 81 TO 86.
WEDNESDAY
SUNNY. HIGHS 84 TO 89.
WYZ284-181015-
BIGHORN NATIONAL FOREST-
159 PM MDT WED SEP 17 2025
TONIGHT
* SKY/WEATHER...........MOSTLY CLEAR.
* MIN TEMPERATURE.......31-36.
* 24 HR TREND.........1 DEGREE WARMER.
* MAX HUMIDITY..........100 PERCENT.
* 24 HR TREND.........UNCHANGED.
* WIND (20 FT)
* AT BURGESS JCT.......SOUTHWEST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...10 PERCENT.
* CWR...................ZERO.
THURSDAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......57-62.
* 24 HR TREND.........8 DEGREES WARMER.
* MIN HUMIDITY..........42-47 PERCENT.
* 24 HR TREND.........24 PERCENT DRIER.
* WIND (20 FT)
* AT BURGESS JCT.......SOUTHWEST WINDS 5 TO 10 MPH IN THE MORNING
SHIFTING TO THE NORTHEAST 5 TO 15 MPH IN THE AFTERNOON.
* CHANCE OF LIGHTNING...3 PERCENT.
* CWR...................ZERO.
THURSDAY NIGHT
* SKY/WEATHER...........MOSTLY CLEAR.
* MIN TEMPERATURE.......34-39.
* 24 HR TREND.........3 DEGREES WARMER.
* MAX HUMIDITY..........72-77 PERCENT.
* 24 HR TREND.........26 PERCENT DRIER.
* WIND (20 FT)
* AT BURGESS JCT.......SOUTH WINDS 5 TO 10 MPH.
* CHANCE OF LIGHTNING...4 PERCENT.
* CWR...................ZERO.
FRIDAY
* SKY/WEATHER...........SUNNY.
* MAX TEMPERATURE.......60-65.
* 24 HR TREND.........3 DEGREES WARMER.
* MIN HUMIDITY..........31-36 PERCENT.
* 24 HR TREND.........11 PERCENT DRIER.
* WIND (20 FT)
* AT BURGESS JCT.......SOUTHWEST WINDS 5 TO 10 MPH IN THE MORNING
SHIFTING TO THE NORTHWEST 5 TO 15 MPH IN THE AFTERNOON.
* CHANCE OF LIGHTNING...0 PERCENT.
* CWR...................ZERO.
FORECAST DAYS 3 THROUGH 7...
FRIDAY NIGHT
MOSTLY CLOUDY. LOWS 38 TO 43. SOUTH WINDS 5 TO
10 MPH.
SATURDAY
MOSTLY CLEAR. LOWS 41 TO 46. HIGHS 63 TO 68.
SOUTHWEST WINDS 5 TO 15 MPH.
SUNDAY
PARTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS. LOWS 35 TO 40. HIGHS 63 TO 68. WEST WINDS 5 TO
15 MPH.
MONDAY
MOSTLY CLEAR. LOWS 38 TO 43. HIGHS 57 TO 62. WEST WINDS
5 TO 15 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 42 TO 47. HIGHS 65 TO 70.
WEDNESDAY
SUNNY. HIGHS 67 TO 72.
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