ST REGIS, MT 59866 Weather Forecast & Current Conditions
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  59866 WEATHER WARNINGS (SEVERE T-STORM & TORNADO)
 CURRENT WEATHER

MULLAN PASS, ID
Current Weather
2:53 PM PDT MAY 16, 2026
Overcast
28°F
Feels Like: 21°F
Dewpoint: 27°F
Rel. Hum.: 96%
Visibility: 9 miles
Wind: WSW at 6 mph
Pressure: 29.91 inches
Last 72 hours

Local Area Snow Depth

Idaho Current Weather

Idaho MOS Forecast Weather


Regional Weather Maps

(Automated weather data from NWS/FAA)
  59866 WEATHER FORECAST
10-Day model forecast maps
2025 Hurricanes

ST REGIS, MT 59866
Weather Forecast

 Snowfall Forecast pages
Snow Depth pages
TONIGHT
Mostly cloudy. Areas of rain early in the evening, then areas of rain and snow in the late evening and overnight. Patchy fog after midnight. Chance of precipitation 40 percent. Lows in the upper 20s to mid 30s. West winds to 15 mph in the evening.
SUNDAY
Chance of valley rain with mountain snow likely in the morning, then chance of rain showers, snow showers and a slight chance of thunderstorms in the afternoon. Patchy fog in the morning. Chance of precipitation 70 percent. Snow level 4500 feet. Little or no new snow accumulation. Highs in the upper 40s to mid 50s. Northwest winds to 15 mph.
SUNDAY NIGHT
Mostly cloudy with a 30 percent chance of rain in the evening, then mostly clear after midnight. Widespread frost and areas of fog after midnight. Lows in the mid 20s to lower 30s. North winds to 15 mph with gusts to around 30 mph.
MONDAY
Mostly sunny. Widespread frost and areas of fog in the morning. A 20 percent chance of showers and thunderstorms in the afternoon. Highs in the mid 50s to lower 60s.
MONDAY NIGHT
Partly cloudy. Areas of frost after midnight. Lows in the 30s.
TUESDAY
Partly cloudy. Areas of frost in the morning. Chance of rain showers and a slight chance of thunderstorms in the afternoon. Chance of precipitation 40 percent. Highs in the upper 50s to mid 60s.
TUESDAY NIGHT
Mostly cloudy with a 20 percent chance of rain in the evening, then partly cloudy after midnight. Lows in the 30s to lower 40s.
WEDNESDAY
Partly cloudy with a 20 percent chance of rain. Highs in the 60s.
WEDNESDAY NIGHT
Partly cloudy. Lows in the mid 30s to lower 40s.
THURSDAY
Partly cloudy. Highs in the mid 60s to lower 70s.
THURSDAY NIGHT
Partly cloudy with a 20 percent chance of rain. Lows in the upper 30s to mid 40s.
FRIDAY
Partly cloudy. Slight chance of rain in the morning, then slight chance of showers and thunderstorms in the afternoon. Chance of precipitation 20 percent. Highs in the mid 60s to lower 70s.
FRIDAY NIGHT
Partly cloudy. Lows in the upper 30s to mid 40s.

  59866 WEATHER SATELLITE LOOPS
Visible Weather Satellite
ST REGIS, MT 59866
Infrared Weather Satellite
ST REGIS, MT 59866
  59866 WEATHER RADAR LOOP
NEXRAD Weather Radar
ST REGIS, MT 59866
 MOS COMPUTER WEATHER FORECAST

MULLAN PASS, ID 3 hourly weather forecast
weather forecast created  7:00 AM CDT  5/16/2026
Saturday
16 MAY 2026		 ST REGIS, MT 59866 weather forecast Day 1, 12 hours 11 AM 31° 25° Mostly Cloudy 72%
SNOW
1–2.5 in		 0% Thunder
( 27% severe)		 WSW   6 88% 28°
High 34° ST REGIS, MT 59866 weather forecast Day 1, 15 hours 2 PM 32° 26° Mostly Cloudy WSW   6 81% 27°
Mostly Cloudy

Snow Likely

 ST REGIS, MT 59866 weather forecast Day 1, 18 hours 5 PM 33° 28° Mostly Cloudy 51%
SNOW
.1–1 in		 0% Thunder
( 10% severe)		 W   6 74% 26°
ST REGIS, MT 59866 weather forecast Day 1, 21 hours 8 PM 33° 29° Mostly Cloudy WSW   5 71% 25°
Sunday
17 MAY 2026		 ST REGIS, MT 59866 weather forecast Day 2, 0 hours 11 PM 32° 27° Mostly Cloudy 34%
SNOW
2.5–5 in		 0% Thunder
( 2% severe)		 WSW   5 74% 25°
Low 27° ST REGIS, MT 59866 weather forecast Day 2, 3 hours 2 AM 31° 28° Mostly Cloudy W   3 77% 25°
High 41° ST REGIS, MT 59866 weather forecast Day 2, 6 hours 5 AM 32° 29° Mostly Cloudy 55%
SNOW
.1–1 in		 0% Thunder
( 7% severe)		 WNW   2 78% 26°

Mostly Cloudy

Snow Likely

 ST REGIS, MT 59866 weather forecast Day 2, 9 hours 8 AM 31° 28° Mostly Cloudy WNW   3 81% 26°
ST REGIS, MT 59866 weather forecast Day 2, 12 hours 11 AM 35° 32° Mostly Cloudy 41%
SNOW
.1–1 in		 0% Thunder
( 22% severe)		 N   3 72% 27°
ST REGIS, MT 59866 weather forecast Day 2, 15 hours 2 PM 39° 37° Mostly Cloudy N   2 64% 28°
ST REGIS, MT 59866 weather forecast Day 2, 18 hours 5 PM 41° 39° Mostly Cloudy 8%

 0% Thunder
( 7% severe)		 N   3 54% 26°
ST REGIS, MT 59866 weather forecast Day 2, 21 hours 8 PM 38° 36° Partly Cloudy   CALM 61% 26°
Monday
18 MAY 2026		 ST REGIS, MT 59866 weather forecast Day 3, 0 hours 11 PM 34° 32° Clear 2%

 0% Thunder
( 1% severe)		   CALM 65% 24°
Low 27° ST REGIS, MT 59866 weather forecast Day 3, 3 hours 2 AM 31° 28° Partly Cloudy   CALM 71% 23°
High 47° ST REGIS, MT 59866 weather forecast Day 3, 6 hours 5 AM 30° 27° Clear 2%

 0% Thunder
( 4% severe)		   CALM 67% 21°

Increasing Clouds

Chance of Rain

 ST REGIS, MT 59866 weather forecast Day 3, 9 hours 8 AM 38° 36° Clear   CALM 58% 25°
ST REGIS, MT 59866 weather forecast Day 3, 15 hours 11 AM 44° 43° Partly Cloudy 38%
RAIN
.5–1 in		 0% Thunder
( 21% severe)		   CALM 48% 26°
ST REGIS, MT 59866 weather forecast Day 3, 18 hours 2 PM 46° 45° Mostly Cloudy   CALM 47% 27°
ST REGIS, MT 59866 weather forecast Day 3, 21 hours 5 PM 46° 45° Mostly Cloudy     W   1 49% 28°

MULLAN PASS, ID extended weather forecast
Tuesday
19 MAY 2026		 Wednesday
20 MAY 2026		 Thursday
21 MAY 2026		 Friday
22 MAY 2026		 Saturday
23 MAY 2026
Low 34° Low 38° Low 40° Low 41° Low 41°
High 48° High 53° High 56° High 58° High 58°
ST REGIS, MT 59866 weather forecast Day 4 ST REGIS, MT 59866 weather forecast Day 5 ST REGIS, MT 59866 weather forecast Day 6 ST REGIS, MT 59866 weather forecast Day 7 <!--SEARCHED_TOWN_NAME--> weather forecast Day 8
Overcast
47% Rain		 Partly Cloudy
24% Rain		 Overcast
16% Rain		 Overcast
19% Rain		 Partly Cloudy
27% Rain
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