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Sun River, Montana Weather Forecast
Sun River, Montana Weather
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Weather Forecast for Sun River, Montana : Cascade County
Issued: 4:03 am MST Dec 17, 2025 Latitude: 47.5332872 Longitude: -111.7213719 View on Google Maps

MouseOver for Detail Forecast
Overnight Wednesday Thursday Friday Saturday Sunday Monday Tuesday
50% chance of rain on Overnight 60% chance of rain on Wednesday Mostly Cloudy on Thursday 40% chance of rain & snow on Friday Mostly Sunny on Saturday Mostly Sunny on Sunday 10% chance of rain & snow on Monday Mostly Sunny on Tuesday
Low: 50°F High: 49 °F High: 45°F High: 48°F High: 40°F High: 41°F High: 41°F High: 42°F
Low: 25°F Low: 36°F Low: 21°F Low: 23°F Low: 25°F Low: 22°F  
Rain Rain Mostly Cloudy Rain & Snow Mostly Sunny Mostly Sunny Rain & Snow Mostly Sunny
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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
Current Conditions at
HELENA - (KHLN)
54°
Mostly Cloudy
as of 4:53 AM MST
Rel. Humidity: 37%
Dew Point: 28°F
Visibility: 10 Miles
Pressure: 29.38 in.
Flight Rule: VFR
Wind Data
24 MPH
Gust: 36 MPH
210° Southwest
Cloud Level(s): Scattered at 8500ft, Broken at 11000ft
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
50% chance of rain Overnight Overnight... A 50 percent chance of rain. Mostly cloudy, with a steady temperature around 50. Breezy, with a southwest wind around 25 mph, with gusts as high as 38 mph.

60% chance of rain Wednesday Wednesday... Rain likely, mainly before 8am. Patchy blowing dust after 8am. Mostly cloudy, then gradually becoming sunny, with a temperature rising to near 49 by 10am, then falling to around 36 during the remainder of the day. Very windy, with a west wind 28 to 38 mph increasing to 38 to 48 mph in the morning. Winds could gust as high as 65 mph. Chance of precipitation is 60%.

Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 25. Windy, with a west wind 27 to 32 mph decreasing to 14 to 19 mph after midnight. Winds could gust as high as 46 mph.

Mostly Cloudy on Thursday Thursday... Mostly cloudy, with a high near 45. South southwest wind 15 to 20 mph, with gusts as high as 29 mph.

40% chance of rain & snow Thursday Night Thursday Night... A chance of rain and snow before 11pm, then a chance of rain. Mostly cloudy, with a low around 36. Breezy, with a southwest wind 16 to 21 mph increasing to 24 to 29 mph in the evening. Winds could gust as high as 43 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.

40% chance of rain & snow Friday Friday... A chance of rain and snow before 8am, then a chance of snow. Partly sunny, with a high near 48. Breezy, with a west wind 22 to 26 mph, with gusts as high as 38 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.

30% chance of snow Friday Night Friday Night... A 30 percent chance of snow, mainly before 11pm. Partly cloudy, with a low around 21. West southwest wind 10 to 14 mph, with gusts as high as 21 mph. Little or no snow accumulation expected.

Mostly Sunny on Saturday Saturday... Mostly sunny, with a high near 40. Breezy, with a west southwest wind 10 to 15 mph increasing to 18 to 23 mph in the afternoon. Winds could gust as high as 33 mph.

Mostly Clear on Saturday Night Saturday Night... Mostly clear, with a low around 23.

Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 41.

20% chance of snow Sunday Night Sunday Night... A chance of snow. Mostly cloudy, with a low around 25.

10% chance of rain & snow Monday Monday... A slight chance of rain and snow. Partly sunny, with a high near 41.

10% chance of rain & snow Monday Night Monday Night... A slight chance of rain and snow. Partly cloudy, with a low around 22.

Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 42.

Current Radar Image


Sun Almanac for Sun River, Montana
Sunrise: 08:10 AM
Sunset: 4:37 PM
Civil Sunrise:07:34 AM
Civil Sunset: 5:13 PM
Nautical Sunrise: 06:55 AM
Nautical Sunset: 5:52 PM
Astro Sunrise: 06:17 AM
Astro Sunset: 6:29 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.