933
FNUS55 KBYZ 190821
FWFBYZ
FIRE WEATHER PLANNING FORECAST FOR SCEN AND SERN MONTANA
NATIONAL WEATHER SERVICE BILLINGS MT
221 AM MDT SAT SEP 19 2026
..COOL AND VERY WET WEEKEND
DISCUSSION
A SLOW-MOVING WEATHER SYSTEM WILL CONTINUE TO BRING FREQUENT
SHOWERS (HEAVY AT TIMES) AND SOME EMBEDDED THUNDERSTORMS THROUGH
THE WEEKEND. RAINFALL TOTALS BETWEEN 1 AND 4 INCHES ARE EXPECTED
ACROSS THE REGION. SNOW LEVELS WILL REMAIN HIGH, ABOVE 10K FEET.
AFTER THE COOL & WET WEEKEND LOOK FOR WARMER AND DRIER CONDITIONS
FOR THE FIRST HALF OF NEXT WEEK. JKL
MTZ123-192215-
GALLATIN NATIONAL FOREST-
221 AM MDT SAT SEP 19 2026
TODAY
* SKY/WEATHER...........CLOUDY. PATCHY FOG IN THE MORNING. RAIN
SHOWERS AND ISOLATED THUNDERSTORMS IN THE MORNING, THEN RAIN
SHOWERS AND SCATTERED THUNDERSTORMS IN THE AFTERNOON.
* MAX TEMPERATURE.......52-62 AT 5000 FEET...46-56 AT 7000 FEET.
* 24 HR TREND.........16 DEGREES COOLER.
* MIN HUMIDITY..........70-80 PERCENT AT 5000 FEET...78-88 PERCENT
AT 7000 FEET.
* 24 HR TREND.........41 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........LIGHT WINDS IN THE MORNING BECOMING NORTH 5
TO 10 MPH IN THE AFTERNOON.
* RIDGETOP.............LIGHT WINDS.
* CHANCE OF LIGHTNING...31 PERCENT.
* CWR...................100 PERCENT.
TONIGHT
* SKY/WEATHER...........MOSTLY CLOUDY. PATCHY FOG IN THE EVENING.
NUMEROUS RAIN SHOWERS IN THE EVENING, THEN SCATTERED RAIN SHOWERS
OVERNIGHT.
* MIN TEMPERATURE.......38-48 AT 5000 FEET...35-45 AT 7000 FEET.
* 24 HR TREND.........3 DEGREES COOLER.
* MAX HUMIDITY..........86-96 PERCENT AT 5000 FEET...82-92 PERCENT
AT 7000 FEET.
* 24 HR TREND.........8 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........LIGHT WINDS.
* RIDGETOP.............NORTHWEST 5 TO 10 MPH.
* CHANCE OF LIGHTNING...11 PERCENT.
* CWR...................40 PERCENT.
SUNDAY
* SKY/WEATHER...........PARTLY SUNNY. SCATTERED RAIN SHOWERS IN THE
MORNING.
* MAX TEMPERATURE.......59-69 AT 5000 FEET...48-58 AT 7000 FEET.
* 24 HR TREND.........7 DEGREES WARMER.
* MIN HUMIDITY..........50-60 PERCENT AT 5000 FEET...55-65 PERCENT
AT 7000 FEET.
* 24 HR TREND.........32 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........LIGHT WINDS IN THE MORNING BECOMING
NORTHWEST 5 TO 10 MPH IN THE AFTERNOON.
* RIDGETOP.............NORTHWEST 5 TO 10 MPH.
* CHANCE OF LIGHTNING...7 PERCENT.
* CWR...................LESS THAN 10 PERCENT.
FORECAST DAYS 3 THROUGH 7...
SUNDAY NIGHT
MOSTLY CLEAR. LOWS 38 TO 46. SOUTH WINDS 5 TO
10 MPH.
MONDAY
MOSTLY CLEAR. LOWS 40 TO 49. HIGHS 67 TO 77. SOUTHWEST
WINDS 5 TO 10 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 43 TO 53. HIGHS 70 TO 80. SOUTH
WINDS 5 TO 10 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 44 TO 54. HIGHS 71 TO 81.
SOUTHWEST WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 44 TO 54. HIGHS 72 TO 82.
FRIDAY
MOSTLY SUNNY. HIGHS 72 TO 82.
MTZ124-192215-
WHEATLAND COUNTY/SWEET GRASS COUNTY-
221 AM MDT SAT SEP 19 2026
TODAY
* SKY/WEATHER...........PATCHY FOG IN THE MORNING. CLOUDY WITH RAIN
SHOWERS AND ISOLATED THUNDERSTORMS. SOME THUNDERSTORMS MAY
PRODUCE HEAVY RAINFALL.
* MAX TEMPERATURE.......56-61.
* 24 HR TREND.........20 DEGREES COOLER.
* MIN HUMIDITY..........76-81 PERCENT.
* 24 HR TREND.........45 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............NORTHWEST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...20 PERCENT.
* CWR...................100 PERCENT.
TONIGHT
* SKY/WEATHER...........CLOUDY. RAIN SHOWERS IN THE EVENING, THEN
NUMEROUS RAIN SHOWERS OVERNIGHT. PATCHY FOG THROUGH THE NIGHT.
* MIN TEMPERATURE.......44-49.
* 24 HR TREND.........6 DEGREES COOLER.
* MAX HUMIDITY..........89-94 PERCENT.
* 24 HR TREND.........5 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............NORTHWEST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...10 PERCENT.
* CWR...................80 PERCENT.
SUNDAY
* SKY/WEATHER...........MOSTLY CLOUDY. NUMEROUS RAIN SHOWERS IN THE
MORNING.
* MAX TEMPERATURE.......63-68.
* 24 HR TREND.........7 DEGREES WARMER.
* MIN HUMIDITY..........53-58 PERCENT.
* 24 HR TREND.........23 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............NORTHWEST WINDS 5 TO 10 MPH IN THE MORNING
SHIFTING TO THE NORTHEAST IN THE AFTERNOON.
* CHANCE OF LIGHTNING...4 PERCENT.
* CWR...................20 PERCENT.
FORECAST DAYS 3 THROUGH 7...
SUNDAY NIGHT
MOSTLY CLOUDY. LOWS 43 TO 48. SOUTHEAST WINDS
5 TO 10 MPH.
MONDAY
MOSTLY CLEAR. LOWS 43 TO 48. HIGHS 71 TO 76. SOUTH
WINDS 5 TO 10 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 46 TO 51. HIGHS 75 TO 80. SOUTHWEST
WINDS 5 TO 10 MPH.
WEDNESDAY
MOSTLY CLEAR. LOWS 46 TO 51. HIGHS 76 TO 81.
SOUTHWEST WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 46 TO 51. HIGHS 77 TO 82.
FRIDAY
MOSTLY SUNNY. HIGHS 76 TO 81.
MTZ125-192215-
STILLWATER COUNTY-
221 AM MDT SAT SEP 19 2026
TODAY
* SKY/WEATHER...........CLOUDY. RAIN SHOWERS AND ISOLATED
THUNDERSTORMS IN THE MORNING, THEN RAIN SHOWERS AND SCATTERED
THUNDERSTORMS IN THE AFTERNOON. PATCHY FOG THROUGH THE DAY. SOME
THUNDERSTORMS MAY PRODUCE HEAVY RAINFALL.
* MAX TEMPERATURE.......56-61.
* 24 HR TREND.........22 DEGREES COOLER.
* MIN HUMIDITY..........80-85 PERCENT.
* 24 HR TREND.........57 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............NORTHWEST WINDS 5 TO 10 MPH.
* CHANCE OF LIGHTNING...31 PERCENT.
* CWR...................100 PERCENT.
TONIGHT
* SKY/WEATHER...........CLOUDY. RAIN SHOWERS AND ISOLATED
THUNDERSTORMS IN THE EVENING, THEN RAIN SHOWERS OVERNIGHT. SOME
THUNDERSTORMS MAY PRODUCE HEAVY RAINFALL IN THE EVENING.
* MIN TEMPERATURE.......44-49.
* 24 HR TREND.........6 DEGREES COOLER.
* MAX HUMIDITY..........83-88 PERCENT.
* 24 HR TREND.........15 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............NORTHWEST WINDS 5 TO 10 MPH.
* CHANCE OF LIGHTNING...15 PERCENT.
* CWR...................90 PERCENT.
SUNDAY
* SKY/WEATHER...........CLOUDY. NUMEROUS RAIN SHOWERS IN THE
MORNING, THEN SCATTERED RAIN SHOWERS IN THE AFTERNOON.
* MAX TEMPERATURE.......61-66.
* 24 HR TREND.........5 DEGREES WARMER.
* MIN HUMIDITY..........56-61 PERCENT.
* 24 HR TREND.........24 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............NORTH WINDS 5 TO 10 MPH.
* CHANCE OF LIGHTNING...9 PERCENT.
* CWR...................50 PERCENT.
FORECAST DAYS 3 THROUGH 7...
SUNDAY NIGHT
PARTLY CLOUDY. LOWS 43 TO 48. LIGHT WINDS.
MONDAY
MOSTLY CLEAR. LOWS 44 TO 49. HIGHS 69 TO 74. SOUTH
WINDS 5 TO 10 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 47 TO 52. HIGHS 74 TO 79. SOUTH
WINDS 5 TO 10 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 47 TO 52. HIGHS 76 TO 81. SOUTH
WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 48 TO 53. HIGHS 78 TO 83.
FRIDAY
MOSTLY SUNNY. HIGHS 78 TO 83.
MTZ126-192215-
BEARTOOTH RANGER DISTRICT CUSTER NATIONAL FOREST-
221 AM MDT SAT SEP 19 2026
TODAY
* SKY/WEATHER...........MOSTLY CLOUDY. RAIN SHOWERS AND ISOLATED
THUNDERSTORMS IN THE MORNING, THEN RAIN SHOWERS AND SCATTERED
THUNDERSTORMS IN THE AFTERNOON. PATCHY FOG THROUGH THE DAY. SOME
THUNDERSTORMS MAY PRODUCE HEAVY RAINFALL.
* MAX TEMPERATURE.......54-63 AT 5000 FEET...47-57 AT 7000 FEET.
* 24 HR TREND.........12 DEGREES COOLER.
* MIN HUMIDITY..........73-83 PERCENT AT 5000 FEET...77-87 PERCENT
AT 7000 FEET.
* 24 HR TREND.........52 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTHWEST WINDS 5 TO 15 MPH.
* RIDGETOP.............NORTHWEST 5 TO 10 MPH.
* CHANCE OF LIGHTNING...35 PERCENT.
* CWR...................90 PERCENT.
TONIGHT
* SKY/WEATHER...........CLOUDY. RAIN SHOWERS AND ISOLATED
THUNDERSTORMS IN THE EVENING, THEN NUMEROUS RAIN SHOWERS
OVERNIGHT. PATCHY FOG THROUGH THE NIGHT. SOME THUNDERSTORMS MAY
PRODUCE HEAVY RAINFALL IN THE EVENING.
* MIN TEMPERATURE.......43-49 AT 5000 FEET...36-46 AT 7000 FEET.
* 24 HR TREND.........5 DEGREES COOLER.
* MAX HUMIDITY..........85-90 PERCENT.
* 24 HR TREND.........13 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTHWEST WINDS 5 TO 15 MPH.
* RIDGETOP.............NORTHWEST 5 TO 15 MPH.
* CHANCE OF LIGHTNING...15 PERCENT.
* CWR...................80 PERCENT.
SUNDAY
* SKY/WEATHER...........CLOUDY. NUMEROUS RAIN SHOWERS IN THE
MORNING, THEN SCATTERED RAIN SHOWERS IN THE AFTERNOON.
* MAX TEMPERATURE.......55-62 AT 5000 FEET...48-58 AT 7000 FEET.
* 24 HR TREND.........1 DEGREE WARMER.
* MIN HUMIDITY..........66-76 PERCENT AT 5000 FEET...70-80 PERCENT
AT 7000 FEET.
* 24 HR TREND.........8 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTHWEST WINDS 5 TO 10 MPH.
* RIDGETOP.............NORTHWEST 5 TO 15 MPH.
* CHANCE OF LIGHTNING...10 PERCENT.
* CWR...................50 PERCENT.
FORECAST DAYS 3 THROUGH 7...
SUNDAY NIGHT
PARTLY CLOUDY. ISOLATED SHOWERS. LOWS 43 TO 49.
WEST WINDS 5 TO 10 MPH.
MONDAY
MOSTLY CLEAR. LOWS 46 TO 53. HIGHS 62 TO 72. SOUTH
WINDS 5 TO 10 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 49 TO 55. HIGHS 67 TO 77. SOUTH
WINDS 5 TO 10 MPH.
WEDNESDAY
PARTLY CLOUDY. ISOLATED SHOWERS. LOWS 49 TO 56.
HIGHS 69 TO 78. SOUTHWEST WINDS 5 TO 15 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 50 TO 57. HIGHS 71 TO 80.
FRIDAY
MOSTLY SUNNY. HIGHS 71 TO 80.
MTZ127-192215-
GOLDEN VALLEY COUNTY/MUSSELSHELL COUNTY-
221 AM MDT SAT SEP 19 2026
TODAY
* SKY/WEATHER...........CLOUDY. PATCHY FOG IN THE MORNING. RAIN
SHOWERS AND ISOLATED THUNDERSTORMS IN THE MORNING, THEN RAIN
SHOWERS AND SCATTERED THUNDERSTORMS IN THE AFTERNOON. SOME
THUNDERSTORMS MAY PRODUCE HEAVY RAINFALL.
* MAX TEMPERATURE.......53-58.
* 24 HR TREND.........20 DEGREES COOLER.
* MIN HUMIDITY..........87-92 PERCENT.
* 24 HR TREND.........53 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............NORTH WINDS 10 TO 20 MPH.
* CHANCE OF LIGHTNING...31 PERCENT.
* CWR...................100 PERCENT.
TONIGHT
* SKY/WEATHER...........CLOUDY. RAIN SHOWERS AND ISOLATED
THUNDERSTORMS IN THE EVENING, THEN RAIN SHOWERS OVERNIGHT. PATCHY
FOG THROUGH THE NIGHT. SOME THUNDERSTORMS MAY PRODUCE HEAVY
RAINFALL IN THE EVENING.
* MIN TEMPERATURE.......48-53.
* 24 HR TREND.........3 DEGREES COOLER.
* MAX HUMIDITY..........100 PERCENT.
* 24 HR TREND.........UNCHANGED.
* WIND (20 FT)
* PLAINS...............NORTH WINDS 10 TO 20 MPH.
* CHANCE OF LIGHTNING...24 PERCENT.
* CWR...................100 PERCENT.
SUNDAY
* SKY/WEATHER...........CLOUDY. PATCHY FOG IN THE MORNING. RAIN
SHOWERS IN THE MORNING, THEN NUMEROUS RAIN SHOWERS IN THE
AFTERNOON.
* MAX TEMPERATURE.......55-60.
* 24 HR TREND.........2 DEGREES WARMER.
* MIN HUMIDITY..........88-93 PERCENT.
* 24 HR TREND.........1 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............NORTH WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...14 PERCENT.
* CWR...................80 PERCENT.
FORECAST DAYS 3 THROUGH 7...
SUNDAY NIGHT
MOSTLY CLOUDY. ISOLATED SHOWERS. LOWS 48 TO 53.
EAST WINDS 5 TO 10 MPH.
MONDAY
MOSTLY CLEAR. LOWS 49 TO 54. HIGHS 64 TO 69. SOUTH
WINDS 5 TO 10 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 52 TO 57. HIGHS 71 TO 76. SOUTH
WINDS 5 TO 10 MPH.
WEDNESDAY
MOSTLY CLEAR. LOWS 52 TO 57. HIGHS 73 TO 78.
SOUTHWEST WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 52 TO 57. HIGHS 74 TO 79.
FRIDAY
SUNNY. HIGHS 74 TO 79.
MTZ128-192215-
YELLOWSTONE COUNTY-
221 AM MDT SAT SEP 19 2026
TODAY
* SKY/WEATHER...........CLOUDY. RAIN SHOWERS AND ISOLATED
THUNDERSTORMS IN THE MORNING, THEN RAIN SHOWERS AND SCATTERED
THUNDERSTORMS IN THE AFTERNOON. PATCHY FOG THROUGH THE DAY. SOME
THUNDERSTORMS MAY PRODUCE HEAVY RAINFALL.
* MAX TEMPERATURE.......57-62.
* 24 HR TREND.........22 DEGREES COOLER.
* MIN HUMIDITY..........86-91 PERCENT.
* 24 HR TREND.........59 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............NORTH WINDS 10 TO 20 MPH.
* CHANCE OF LIGHTNING...35 PERCENT.
* CWR...................100 PERCENT.
TONIGHT
* SKY/WEATHER...........CLOUDY. RAIN SHOWERS AND SCATTERED
THUNDERSTORMS IN THE EVENING, THEN RAIN SHOWERS OVERNIGHT. PATCHY
FOG THROUGH THE NIGHT. SOME THUNDERSTORMS MAY PRODUCE HEAVY
RAINFALL IN THE EVENING.
* MIN TEMPERATURE.......49-54.
* 24 HR TREND.........5 DEGREES COOLER.
* MAX HUMIDITY..........95-100 PERCENT.
* 24 HR TREND.........3 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............NORTH WINDS 10 TO 20 MPH.
* CHANCE OF LIGHTNING...25 PERCENT.
* CWR...................90 PERCENT.
SUNDAY
* SKY/WEATHER...........CLOUDY. PATCHY FOG IN THE MORNING. RAIN
SHOWERS IN THE MORNING, THEN NUMEROUS RAIN SHOWERS IN THE
AFTERNOON.
* MAX TEMPERATURE.......61-66.
* 24 HR TREND.........4 DEGREES WARMER.
* MIN HUMIDITY..........79-84 PERCENT.
* 24 HR TREND.........7 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............NORTHWEST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...9 PERCENT.
* CWR...................70 PERCENT.
FORECAST DAYS 3 THROUGH 7...
SUNDAY NIGHT
MOSTLY CLOUDY. ISOLATED SHOWERS. LOWS 47 TO 52.
EAST WINDS 5 TO 10 MPH.
MONDAY
MOSTLY CLEAR. LOWS 48 TO 53. HIGHS 70 TO 75. SOUTH
WINDS 5 TO 10 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 50 TO 55. HIGHS 75 TO 80. SOUTH
WINDS 5 TO 10 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 51 TO 56. HIGHS 77 TO 82.
SOUTHWEST WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 51 TO 56. HIGHS 79 TO 84.
FRIDAY
MOSTLY SUNNY. HIGHS 78 TO 83.
MTZ129-192215-
CROW INDIAN RESERVATION/BIGHORN CANYON REC AREA-
221 AM MDT SAT SEP 19 2026
TODAY
* SKY/WEATHER...........CLOUDY. RAIN SHOWERS AND ISOLATED
THUNDERSTORMS IN THE MORNING, THEN RAIN SHOWERS AND SCATTERED
THUNDERSTORMS IN THE AFTERNOON. PATCHY FOG THROUGH THE DAY. SOME
THUNDERSTORMS MAY PRODUCE HEAVY RAINFALL.
* MAX TEMPERATURE.......55-65 AT 5000 FEET...49-55 AT 7000 FEET.
* 24 HR TREND.........19 DEGREES COOLER.
* MIN HUMIDITY..........73-83 PERCENT AT 5000 FEET...81-91 PERCENT
AT 7000 FEET.
* 24 HR TREND.........62 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTHWEST WINDS 5 TO 10 MPH.
* RIDGETOP.............LIGHT WINDS.
* CHANCE OF LIGHTNING...44 PERCENT.
* CWR...................90 PERCENT.
TONIGHT
* SKY/WEATHER...........CLOUDY. RAIN SHOWERS AND SCATTERED
THUNDERSTORMS IN THE EVENING, THEN NUMEROUS RAIN SHOWERS
OVERNIGHT. PATCHY FOG THROUGH THE NIGHT. SOME THUNDERSTORMS MAY
PRODUCE HEAVY RAINFALL IN THE EVENING.
* MIN TEMPERATURE.......44-50 AT 5000 FEET...41-46 AT 7000 FEET.
* 24 HR TREND.........6 DEGREES COOLER.
* MAX HUMIDITY..........85-95 PERCENT AT 5000 FEET...90-100 PERCENT
AT 7000 FEET.
* 24 HR TREND.........1 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTHWEST WINDS 5 TO 15 MPH.
* RIDGETOP.............NORTHWEST 5 TO 10 MPH.
* CHANCE OF LIGHTNING...27 PERCENT.
* CWR...................90 PERCENT.
SUNDAY
* SKY/WEATHER...........PATCHY FOG IN THE MORNING. CLOUDY WITH RAIN
SHOWERS.
* MAX TEMPERATURE.......53-63 AT 5000 FEET...46-53 AT 7000 FEET.
* 24 HR TREND.........1 DEGREE COOLER.
* MIN HUMIDITY..........71-81 PERCENT AT 5000 FEET...78-88 PERCENT
AT 7000 FEET.
* 24 HR TREND.........UNCHANGED.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTHWEST WINDS 5 TO 15 MPH.
* RIDGETOP.............NORTHWEST 5 TO 10 MPH.
* CHANCE OF LIGHTNING...11 PERCENT.
* CWR...................80 PERCENT.
FORECAST DAYS 3 THROUGH 7...
SUNDAY NIGHT
MOSTLY CLOUDY. SCATTERED SHOWERS. LOWS 43 TO 49.
SOUTHWEST WINDS 5 TO 10 MPH.
MONDAY
MOSTLY CLEAR. LOWS 46 TO 52. HIGHS 63 TO 73. SOUTHEAST
WINDS 5 TO 10 MPH.
TUESDAY
MOSTLY CLEAR. ISOLATED SHOWERS. LOWS 50 TO 55. HIGHS
68 TO 78. SOUTHEAST WINDS 5 TO 10 MPH.
WEDNESDAY
PARTLY CLOUDY. LOWS 51 TO 56. HIGHS 69 TO 79.
SOUTHEAST WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 52 TO 57. HIGHS 72 TO 82.
FRIDAY
MOSTLY SUNNY. HIGHS 72 TO 82.
MTZ130-192215-
NORTHERN ROSEBUD/NORTHERN TREASURE COUNTIES-
221 AM MDT SAT SEP 19 2026
TODAY
* SKY/WEATHER...........CLOUDY. PATCHY FOG IN THE MORNING. RAIN
SHOWERS AND ISOLATED THUNDERSTORMS IN THE MORNING, THEN RAIN
SHOWERS AND SCATTERED THUNDERSTORMS IN THE AFTERNOON. SOME
THUNDERSTORMS MAY PRODUCE HEAVY RAINFALL.
* MAX TEMPERATURE.......62-67.
* 24 HR TREND.........21 DEGREES COOLER.
* MIN HUMIDITY..........90-95 PERCENT.
* 24 HR TREND.........65 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............NORTHEAST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...35 PERCENT.
* CWR...................100 PERCENT.
TONIGHT
* SKY/WEATHER...........CLOUDY. RAIN SHOWERS AND SCATTERED
THUNDERSTORMS IN THE EVENING, THEN RAIN SHOWERS OVERNIGHT. PATCHY
FOG THROUGH THE NIGHT. SOME THUNDERSTORMS MAY PRODUCE HEAVY
RAINFALL IN THE EVENING.
* MIN TEMPERATURE.......50-55.
* 24 HR TREND.........5 DEGREES COOLER.
* MAX HUMIDITY..........100 PERCENT.
* 24 HR TREND.........UNCHANGED.
* WIND (20 FT)
* PLAINS...............NORTHEAST WINDS 10 TO 20 MPH.
* CHANCE OF LIGHTNING...26 PERCENT.
* CWR...................90 PERCENT.
SUNDAY
* SKY/WEATHER...........CLOUDY. PATCHY FOG IN THE MORNING. RAIN
SHOWERS IN THE MORNING, THEN NUMEROUS RAIN SHOWERS IN THE
AFTERNOON.
* MAX TEMPERATURE.......61-66.
* 24 HR TREND.........1 DEGREE COOLER.
* MIN HUMIDITY..........85-90 PERCENT.
* 24 HR TREND.........5 PERCENT DRIER.
* WIND (20 FT)
* PLAINS...............EAST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...11 PERCENT.
* CWR...................60 PERCENT.
FORECAST DAYS 3 THROUGH 7...
SUNDAY NIGHT
MOSTLY CLOUDY. ISOLATED SHOWERS. LOWS 46 TO 51.
EAST WINDS 5 TO 10 MPH.
MONDAY
MOSTLY CLEAR. LOWS 47 TO 52. HIGHS 69 TO 74. SOUTHEAST
WINDS 5 TO 15 MPH.
TUESDAY
MOSTLY CLEAR. ISOLATED SHOWERS. LOWS 50 TO 55. HIGHS
76 TO 81. SOUTHEAST WINDS 5 TO 10 MPH.
WEDNESDAY
MOSTLY CLEAR. LOWS 50 TO 55. HIGHS 78 TO 83. LIGHT
WINDS.
THURSDAY
MOSTLY CLEAR. LOWS 52 TO 57. HIGHS 80 TO 85.
FRIDAY
SUNNY. HIGHS 80 TO 85.
MTZ131-192215-
NORTHERN CHEYENNE INDIAN RESERVATION/ASHLAND RANGER DISTRICT
CUSTER NATL FOREST-
221 AM MDT SAT SEP 19 2026
TODAY
* SKY/WEATHER...........CLOUDY. PATCHY FOG IN THE MORNING. RAIN
SHOWERS AND ISOLATED THUNDERSTORMS IN THE MORNING, THEN RAIN
SHOWERS AND SCATTERED THUNDERSTORMS IN THE AFTERNOON. SOME
THUNDERSTORMS MAY PRODUCE HEAVY RAINFALL.
* MAX TEMPERATURE.......63-68.
* 24 HR TREND.........20 DEGREES COOLER.
* MIN HUMIDITY..........79-84 PERCENT.
* 24 HR TREND.........57 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTH WINDS 5 TO 10 MPH.
* RIDGETOP.............SOUTHEAST 5 TO 10 MPH.
* CHANCE OF LIGHTNING...39 PERCENT.
* CWR...................90 PERCENT.
TONIGHT
* SKY/WEATHER...........CLOUDY. RAIN SHOWERS AND SCATTERED
THUNDERSTORMS IN THE EVENING, THEN RAIN SHOWERS OVERNIGHT. PATCHY
FOG THROUGH THE NIGHT. SOME THUNDERSTORMS MAY PRODUCE HEAVY
RAINFALL IN THE EVENING.
* MIN TEMPERATURE.......47-52.
* 24 HR TREND.........6 DEGREES COOLER.
* MAX HUMIDITY..........100 PERCENT.
* 24 HR TREND.........UNCHANGED.
* WIND (20 FT)
* SLOPE/VALLEY.........EAST WINDS 5 TO 15 MPH.
* RIDGETOP.............SOUTH 5 TO 10 MPH.
* CHANCE OF LIGHTNING...32 PERCENT.
* CWR...................90 PERCENT.
SUNDAY
* SKY/WEATHER...........PATCHY FOG IN THE MORNING. CLOUDY WITH RAIN
SHOWERS.
* MAX TEMPERATURE.......60-65.
* 24 HR TREND.........3 DEGREES COOLER.
* MIN HUMIDITY..........71-76 PERCENT.
* 24 HR TREND.........8 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTH WINDS 5 TO 15 MPH.
* RIDGETOP.............NORTH 5 TO 10 MPH.
* CHANCE OF LIGHTNING...10 PERCENT.
* CWR...................80 PERCENT.
FORECAST DAYS 3 THROUGH 7...
SUNDAY NIGHT
CLOUDY. SCATTERED SHOWERS. LOWS 43 TO 48. EAST
WINDS 5 TO 10 MPH.
MONDAY
MOSTLY CLEAR. LOWS 44 TO 49. HIGHS 68 TO 73. SOUTHEAST
WINDS 5 TO 10 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 49 TO 54. HIGHS 77 TO 82. SOUTHEAST
WINDS 5 TO 10 MPH.
WEDNESDAY
MOSTLY CLEAR. LOWS 48 TO 53. HIGHS 77 TO 82.
SOUTHEAST WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 50 TO 55. HIGHS 81 TO 86.
FRIDAY
MOSTLY SUNNY. HIGHS 81 TO 86.
MTZ132-192215-
CUSTER COUNTY-
221 AM MDT SAT SEP 19 2026
TODAY
* SKY/WEATHER...........PATCHY FOG IN THE MORNING. CLOUDY WITH RAIN
SHOWERS AND ISOLATED THUNDERSTORMS. SOME THUNDERSTORMS MAY
PRODUCE HEAVY RAINFALL.
* MAX TEMPERATURE.......61-66.
* 24 HR TREND.........21 DEGREES COOLER.
* MIN HUMIDITY..........81-86 PERCENT.
* 24 HR TREND.........47 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............EAST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...18 PERCENT.
* CWR...................90 PERCENT.
TONIGHT
* SKY/WEATHER...........CLOUDY WITH RAIN SHOWERS AND ISOLATED
THUNDERSTORMS. PATCHY FOG OVERNIGHT. SOME THUNDERSTORMS MAY
PRODUCE HEAVY RAINFALL.
* MIN TEMPERATURE.......49-54.
* 24 HR TREND.........6 DEGREES COOLER.
* MAX HUMIDITY..........100 PERCENT.
* 24 HR TREND.........UNCHANGED.
* WIND (20 FT)
* PLAINS...............EAST WINDS 10 TO 20 MPH.
* CHANCE OF LIGHTNING...16 PERCENT.
* CWR...................90 PERCENT.
SUNDAY
* SKY/WEATHER...........PATCHY FOG IN THE MORNING. CLOUDY WITH RAIN
SHOWERS.
* MAX TEMPERATURE.......57-62.
* 24 HR TREND.........4 DEGREES COOLER.
* MIN HUMIDITY..........84-89 PERCENT.
* 24 HR TREND.........3 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............EAST WINDS 10 TO 20 MPH.
* CHANCE OF LIGHTNING...14 PERCENT.
* CWR...................80 PERCENT.
FORECAST DAYS 3 THROUGH 7...
SUNDAY NIGHT
MOSTLY CLOUDY. SCATTERED SHOWERS. LOWS 46 TO 51.
SOUTHEAST WINDS 5 TO 15 MPH.
MONDAY
PARTLY CLOUDY. LOWS 47 TO 52. HIGHS 64 TO 69. SOUTHEAST
WINDS 5 TO 15 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 51 TO 56. HIGHS 73 TO 78. SOUTHEAST
WINDS 5 TO 15 MPH.
WEDNESDAY
MOSTLY CLEAR. ISOLATED SHOWERS AND THUNDERSTORMS.
LOWS 52 TO 57. HIGHS 76 TO 81. SOUTHEAST WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 54 TO 59. HIGHS 79 TO 84.
FRIDAY
SUNNY. HIGHS 78 TO 83.
MTZ133-192215-
SIOUX RANGER DISTRICT CUSTER NATIONAL FOREST-
221 AM MDT SAT SEP 19 2026
TODAY
* SKY/WEATHER...........CLOUDY. PATCHY FOG IN THE MORNING. RAIN
SHOWERS AND ISOLATED THUNDERSTORMS IN THE MORNING, THEN NUMEROUS
RAIN SHOWERS IN THE AFTERNOON.
* MAX TEMPERATURE.......62-67.
* 24 HR TREND.........14 DEGREES COOLER.
* MIN HUMIDITY..........82-87 PERCENT.
* 24 HR TREND.........36 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............EAST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...15 PERCENT.
* CWR...................70 PERCENT.
TONIGHT
* SKY/WEATHER...........CLOUDY. RAIN SHOWERS AND ISOLATED
THUNDERSTORMS IN THE EVENING, THEN RAIN SHOWERS OVERNIGHT.
* MIN TEMPERATURE.......48-53.
* 24 HR TREND.........6 DEGREES COOLER.
* MAX HUMIDITY..........100 PERCENT.
* 24 HR TREND.........UNCHANGED.
* WIND (20 FT)
* PLAINS...............EAST WINDS 10 TO 20 MPH.
* CHANCE OF LIGHTNING...15 PERCENT.
* CWR...................80 PERCENT.
SUNDAY
* SKY/WEATHER...........CLOUDY WITH RAIN SHOWERS.
* MAX TEMPERATURE.......56-61.
* 24 HR TREND.........6 DEGREES COOLER.
* MIN HUMIDITY..........91-96 PERCENT.
* 24 HR TREND.........9 PERCENT WETTER.
* WIND (20 FT)
* PLAINS...............EAST WINDS 10 TO 20 MPH WITH GUSTS TO AROUND
30 MPH.
* CHANCE OF LIGHTNING...13 PERCENT.
* CWR...................100 PERCENT.
FORECAST DAYS 3 THROUGH 7...
SUNDAY NIGHT
CLOUDY. NUMEROUS SHOWERS. LOWS 45 TO 50. EAST
WINDS 10 TO 20 MPH.
MONDAY
MOSTLY CLOUDY. LOWS 45 TO 50. HIGHS 62 TO 67. SOUTHEAST
WINDS 10 TO 20 MPH WITH GUSTS TO AROUND 30 MPH.
TUESDAY
PARTLY CLOUDY. LOWS 49 TO 54. HIGHS 71 TO 76.
SOUTHEAST WINDS 10 TO 20 MPH WITH GUSTS TO AROUND 30 MPH.
WEDNESDAY
PARTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS.
LOWS 50 TO 55. HIGHS 75 TO 80. SOUTHEAST WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 51 TO 56. HIGHS 78 TO 83.
FRIDAY
MOSTLY SUNNY. HIGHS 78 TO 83.
WYZ274-192215-
SHERIDAN COUNTY-
221 AM MDT SAT SEP 19 2026
TODAY
* SKY/WEATHER...........MOSTLY CLOUDY. PATCHY FOG IN THE MORNING.
SCATTERED RAIN SHOWERS AND ISOLATED THUNDERSTORMS IN THE MORNING,
THEN RAIN SHOWERS AND SCATTERED THUNDERSTORMS IN THE AFTERNOON.
SOME THUNDERSTORMS MAY PRODUCE HEAVY RAINFALL.
* MAX TEMPERATURE.......61-66.
* 24 HR TREND.........21 DEGREES COOLER.
* MIN HUMIDITY..........82-87 PERCENT.
* 24 HR TREND.........57 PERCENT WETTER.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTHWEST WINDS 5 TO 10 MPH.
* RIDGETOP.............WEST 5 TO 10 MPH.
* CHANCE OF LIGHTNING...39 PERCENT.
* CWR...................90 PERCENT.
TONIGHT
* SKY/WEATHER...........MOSTLY CLOUDY. RAIN SHOWERS AND SCATTERED
THUNDERSTORMS IN THE EVENING, THEN RAIN SHOWERS OVERNIGHT. PATCHY
FOG THROUGH THE NIGHT. SOME THUNDERSTORMS MAY PRODUCE HEAVY
RAINFALL IN THE EVENING.
* MIN TEMPERATURE.......42-47.
* 24 HR TREND.........8 DEGREES COOLER.
* MAX HUMIDITY..........100 PERCENT.
* 24 HR TREND.........UNCHANGED.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTHWEST WINDS 5 TO 10 MPH.
* RIDGETOP.............WEST 5 TO 10 MPH.
* CHANCE OF LIGHTNING...26 PERCENT.
* CWR...................80 PERCENT.
SUNDAY
* SKY/WEATHER...........CLOUDY. PATCHY FOG IN THE MORNING. NUMEROUS
RAIN SHOWERS IN THE MORNING, THEN RAIN SHOWERS AND ISOLATED
THUNDERSTORMS IN THE AFTERNOON. SOME THUNDERSTORMS MAY PRODUCE
HEAVY RAINFALL IN THE AFTERNOON.
* MAX TEMPERATURE.......61-66.
* 24 HR TREND.........UNCHANGED.
* MIN HUMIDITY..........69-74 PERCENT.
* 24 HR TREND.........13 PERCENT DRIER.
* WIND (20 FT)
* SLOPE/VALLEY.........NORTHWEST WINDS 5 TO 10 MPH.
* RIDGETOP.............NORTHWEST 5 TO 15 MPH.
* CHANCE OF LIGHTNING...18 PERCENT.
* CWR...................70 PERCENT.
FORECAST DAYS 3 THROUGH 7...
SUNDAY NIGHT
MOSTLY CLOUDY. AREAS OF FOG. SCATTERED SHOWERS.
LOWS 40 TO 45. NORTHWEST WINDS 5 TO 10 MPH.
MONDAY
MOSTLY CLEAR. LOWS 40 TO 45. HIGHS 69 TO 74. SOUTHEAST
WINDS 5 TO 10 MPH.
TUESDAY
MOSTLY CLEAR. LOWS 44 TO 49. HIGHS 75 TO 80. LIGHT
WINDS.
WEDNESDAY
MOSTLY CLEAR. LOWS 44 TO 49. HIGHS 77 TO 82.
SOUTHWEST WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 45 TO 50. HIGHS 80 TO 85.
FRIDAY
MOSTLY SUNNY. HIGHS 81 TO 86.
WYZ284-192215-
BIGHORN NATIONAL FOREST-
221 AM MDT SAT SEP 19 2026
TODAY
* SKY/WEATHER...........MOSTLY CLOUDY. NUMEROUS RAIN SHOWERS AND
ISOLATED THUNDERSTORMS IN THE MORNING, THEN RAIN SHOWERS AND
SCATTERED THUNDERSTORMS IN THE AFTERNOON. PATCHY FOG THROUGH THE
DAY. SOME THUNDERSTORMS MAY PRODUCE HEAVY RAINFALL.
* MAX TEMPERATURE.......50-55.
* 24 HR TREND.........13 DEGREES COOLER.
* MIN HUMIDITY..........79-84 PERCENT.
* 24 HR TREND.........42 PERCENT WETTER.
* WIND (20 FT)
* AT BURGESS JCT.......NORTHWEST WINDS 5 TO 10 MPH.
* CHANCE OF LIGHTNING...45 PERCENT.
* CWR...................80 PERCENT.
TONIGHT
* SKY/WEATHER...........MOSTLY CLOUDY. RAIN SHOWERS AND SCATTERED
THUNDERSTORMS IN THE EVENING, THEN RAIN SHOWERS OVERNIGHT. PATCHY
FOG THROUGH THE NIGHT. SOME THUNDERSTORMS MAY PRODUCE HEAVY
RAINFALL IN THE EVENING.
* MIN TEMPERATURE.......32-37.
* 24 HR TREND.........7 DEGREES COOLER.
* MAX HUMIDITY..........100 PERCENT.
* 24 HR TREND.........UNCHANGED.
* WIND (20 FT)
* AT BURGESS JCT.......NORTHWEST WINDS 5 TO 10 MPH.
* CHANCE OF LIGHTNING...25 PERCENT.
* CWR...................80 PERCENT.
SUNDAY
* SKY/WEATHER...........CLOUDY. PATCHY FOG IN THE MORNING. RAIN
SHOWERS IN THE MORNING, THEN RAIN SHOWERS AND ISOLATED
THUNDERSTORMS IN THE AFTERNOON. SOME THUNDERSTORMS MAY PRODUCE
HEAVY RAINFALL IN THE AFTERNOON.
* MAX TEMPERATURE.......47-52.
* 24 HR TREND.........3 DEGREES COOLER.
* MIN HUMIDITY..........72-77 PERCENT.
* 24 HR TREND.........7 PERCENT DRIER.
* WIND (20 FT)
* AT BURGESS JCT.......NORTHWEST WINDS 5 TO 15 MPH.
* CHANCE OF LIGHTNING...16 PERCENT.
* CWR...................70 PERCENT.
FORECAST DAYS 3 THROUGH 7...
SUNDAY NIGHT
MOSTLY CLOUDY. SCATTERED SHOWERS. LOWS 29 TO 34.
WEST WINDS 5 TO 10 MPH.
MONDAY
MOSTLY CLEAR. LOWS 32 TO 37. HIGHS 55 TO 60. SOUTH
WINDS 5 TO 10 MPH.
TUESDAY
MOSTLY CLEAR. ISOLATED SHOWERS. LOWS 37 TO 42. HIGHS
62 TO 67. SOUTH WINDS 5 TO 10 MPH.
WEDNESDAY
PARTLY CLOUDY. ISOLATED SHOWERS. LOWS 37 TO 42.
HIGHS 62 TO 67. SOUTHWEST WINDS 5 TO 15 MPH.
THURSDAY
MOSTLY CLEAR. LOWS 39 TO 44. HIGHS 65 TO 70.
FRIDAY
MOSTLY SUNNY. HIGHS 65 TO 70.
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