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Sullivan, Montana Weather Forecast
Sullivan, Montana Weather
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Weather Forecast for Sullivan, Montana : Glacier County
Issued: 4:03 am MST Dec 17, 2025 Latitude: 48.9874862 Longitude: -113.049536 View on Google Maps

MouseOver for Detail Forecast
Overnight Wednesday Thursday Friday Saturday Sunday Monday Tuesday
40% chance of rain on Overnight 60% chance of rain & snow on Wednesday Partly Sunny on Thursday 20% chance of snow on Friday 10% chance of snow on Saturday Mostly Sunny on Sunday 10% chance of snow on Monday Mostly Sunny on Tuesday
Low: 40°F High: 41 °F High: 39°F High: 37°F High: 33°F High: 34°F High: 33°F High: 37°F
Low: 19°F Low: 26°F Low: 11°F Low: 19°F Low: 14°F Low: 17°F  
Rain Rain & Snow Partly Sunny Snow Snow Mostly Sunny Snow Mostly Sunny
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Current Conditions at
CUTBANK - (KCTB)
41°
Feels like 31°F
Clear
as of 4:56 AM MST
Rel. Humidity: 75%
Dew Point: 34°F
Visibility: 10 Miles
Pressure: 29.15 in.
Flight Rule: VFR
Wind Data
21 MPH
Gust: 29 MPH
230° Southwest
Cloud Level(s): Clear
Current Conditions at
KALISPELL - (KGPI)
43°
Feels like 37°F
Cloudy
Light Rain
as of 4:55 AM MST
Rel. Humidity: 86%
Dew Point: 39°F
Visibility: 10 Miles
Pressure: 29.23 in.
Flight Rule: VFR
Wind Data
9 MPH
210° Southwest
Cloud Level(s): Solid Overcast at 3500ft
Current Conditions at
GREAT FALLS - (KGTF)
52°
Clear
as of 4:53 AM MST
Rel. Humidity: 40%
Dew Point: 28°F
Visibility: 10 Miles
Pressure: 29.22 in.
Flight Rule: VFR
Wind Data
32 MPH
Gust: 44 MPH
220° Southwest
Cloud Level(s): Clear
40% chance of rain Overnight Overnight... A 40 percent chance of rain. Mostly cloudy, with a steady temperature around 40. Breezy, with a south southwest wind around 23 mph, with gusts as high as 39 mph.
60% chance of rain & snow Wednesday Wednesday... Rain and snow likely before 2pm, then a slight chance of snow between 2pm and 4pm. Patchy blowing dust. Partly sunny, with a temperature rising to near 41 by 10am, then falling to around 30 during the remainder of the day. Windy, with a south southwest wind 25 to 30 mph becoming west 39 to 44 mph in the afternoon. Winds could gust as high as 70 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 19. Blustery, with a west southwest wind 21 to 26 mph decreasing to 13 to 18 mph in the evening. Winds could gust as high as 45 mph.
Partly Sunny on Thursday Thursday... Partly sunny, with a high near 39. South southwest wind around 17 mph, with gusts as high as 31 mph.
40% chance of snow Thursday Night Thursday Night... A 40 percent chance of snow. Mostly cloudy, with a low around 26. Breezy, with a southwest wind 13 to 23 mph, with gusts as high as 43 mph. New snow accumulation of less than a half inch possible.
20% chance of snow Friday Friday... A 20 percent chance of snow. Mostly sunny, with a high near 37. Breezy, with a west wind 14 to 22 mph, with gusts as high as 43 mph.
10% chance of snow Friday Night Friday Night... A 10 percent chance of snow before 11pm. Partly cloudy, with a low around 11. West southwest wind around 9 mph, with gusts as high as 18 mph.
10% chance of snow Saturday Saturday... A slight chance of snow after 11am. Mostly sunny, with a high near 33. West southwest wind 10 to 18 mph, with gusts as high as 32 mph.
Cloudy on Saturday Night Saturday Night... Partly cloudy, with a low around 19.
Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 34.
20% chance of snow Sunday Night Sunday Night... A chance of snow. Mostly cloudy, with a low around 14.
10% chance of snow Monday Monday... A slight chance of snow. Mostly sunny, with a high near 33.
10% chance of snow Monday Night Monday Night... A slight chance of snow. Partly cloudy, with a low around 17.
Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 37.
Sun Almanac for Sullivan, Montana
Sunrise: 08:21 AM
Sunset: 4:36 PM
Civil Sunrise:07:44 AM
Civil Sunset: 5:13 PM
Nautical Sunrise: 07:04 AM
Nautical Sunset: 5:54 PM
Astro Sunrise: 06:25 AM
Astro Sunset: 6:32 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.