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Portage, Montana Weather Forecast
Portage, Montana Weather
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Weather Forecast for Portage, Montana : Cascade County
Issued: 9:43 pm MST Dec 17, 2025 Latitude: 47.6527415 Longitude: -111.1246852 View on Google Maps

MouseOver for Detail Forecast
Tonight Thursday Friday Saturday Sunday Monday Tuesday Wednesday
20% chance of snow on Tonight Increasing Clouds on Thursday 20% chance of rain & snow on Friday Sunny on Saturday Mostly Sunny on Sunday 20% chance of rain & snow on Monday Mostly Sunny on Tuesday 10% chance of snow on Wednesday
Low: 16°F High: 45°F High: 49°F High: 40°F High: 44°F High: 42°F High: 42°F High: 44°F
Low: 49 °F Low: 25°F Low: 26°F Low: 26°F Low: 23°F Low: 26°F  
Snow Increasing Clouds Rain & Snow Sunny Mostly Sunny Rain & Snow Mostly Sunny Snow
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Current Conditions at
GREAT FALLS - (KGTF)
19°
Clear
as of 8:53 PM MST
Rel. Humidity: 85%
Dew Point: 16°F
Visibility: 10 Miles
Pressure: 29.82 in.
Flight Rule: VFR
Wind Data
6 MPH
040° Northeast
Cloud Level(s): Clear
Current Conditions at
CUTBANK - (KCTB)
12°
Feels like -6°F
Clear
as of 8:56 PM MST
Rel. Humidity: 66%
Dew Point: 3°F
Visibility: 10 Miles
Pressure: 29.78 in.
Flight Rule: VFR
Wind Data
22 MPH
Gust: 31 MPH
340° North
Cloud Level(s): Clear
20% chance of snow Tonight Tonight... A 20 percent chance of snow before 11pm. Partly cloudy, with a low around 16. Blustery, with a northwest wind 15 to 24 mph becoming southwest after midnight. Winds could gust as high as 36 mph.

Increasing Clouds on Thursday Thursday... Increasing clouds, with a high near 45. Southwest wind 15 to 18 mph, with gusts as high as 26 mph.

20% chance of rain Thursday Night Thursday Night... A 20 percent chance of rain after 11pm. Mostly cloudy, with a temperature rising to around 49 by 2am. Windy, with a south southwest wind 21 to 26 mph increasing to 31 to 36 mph after midnight. Winds could gust as high as 48 mph.

20% chance of rain & snow Friday Friday... A slight chance of rain and snow before 11am, then a slight chance of snow. Partly sunny, with a high near 49. Windy, with a west wind 29 to 34 mph decreasing to 22 to 27 mph in the afternoon. Winds could gust as high as 46 mph. Chance of precipitation is 20%.

20% chance of snow Friday Night Friday Night... A 20 percent chance of snow before 11pm. Partly cloudy, with a low around 25. West southwest wind 14 to 17 mph, with gusts as high as 22 mph.

Sunny on Saturday Saturday... Sunny, with a high near 40. Breezy, with a west southwest wind 18 to 23 mph, with gusts as high as 31 mph.

Cloudy on Saturday Night Saturday Night... Partly cloudy, with a low around 26. Southwest wind 18 to 21 mph, with gusts as high as 29 mph.

Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 44. South southwest wind 10 to 16 mph, with gusts as high as 22 mph.

20% chance of rain & snow Sunday Night Sunday Night... A chance of rain and snow, mainly after 5am. Mostly cloudy, with a low around 26.

20% chance of rain & snow Monday Monday... A chance of rain and snow before 8am, then a chance of snow between 8am and 11am. Partly sunny, with a high near 42.

Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 23.

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

Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 26.

10% chance of snow Wednesday Wednesday... A slight chance of snow. Partly sunny, with a high near 44.

Current Radar Image


Sun Almanac for Portage, Montana
Sunrise: 08:09 AM
Sunset: 4:34 PM
Civil Sunrise:07:33 AM
Civil Sunset: 5:10 PM
Nautical Sunrise: 06:53 AM
Nautical Sunset: 5:49 PM
Astro Sunrise: 06:16 AM
Astro Sunset: 6:27 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.