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Portage, Montana Weather Forecast
Portage, Montana Weather
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Weather Forecast for Portage, Montana : Cascade County
Issued: 9:18 am MST Dec 17, 2025 Latitude: 47.6527415 Longitude: -111.1246852 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Thursday Friday Saturday Sunday Monday Tuesday
Dust on This Afternoon Dust on Tonight Partly Sunny on Thursday 30% chance of rain & snow on Friday Mostly Sunny on Saturday Mostly Sunny on Sunday 10% chance of rain & snow on Monday Partly Sunny on Tuesday
High: 36 °F Low: 23°F High: 46°F High: 48°F High: 40°F High: 40°F High: 40°F High: 39°F
Low: 36°F Low: 20°F Low: 24°F Low: 25°F Low: 22°F  
Dust Dust Partly Sunny Rain & Snow Mostly Sunny Mostly Sunny Rain & Snow Partly Sunny
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Current Conditions at
GREAT FALLS - (KGTF)
41°
Feels like 28°F
Partly Cloudy
Light Rain
as of 11:53 AM MST
Rel. Humidity: 60%
Dew Point: 28°F
Visibility: 10 Miles
Pressure: 29.20 in.
Flight Rule: VFR
Wind Data
38 MPH
Gust: 55 MPH
250° West
Cloud Level(s): Few at 5000ft, Scattered at 7500ft
Current Conditions at
HELENA - (KHLN)
43°
Feels like 30°F
Clear
as of 11:53 AM MST
Rel. Humidity: 35%
Dew Point: 18°F
Visibility: 10 Miles
Pressure: 29.32 in.
Flight Rule: VFR
Wind Data
47 MPH
Gust: 69 MPH
280° West
Cloud Level(s): Clear
Current Conditions at
CUTBANK - (KCTB)
37°
Feels like 20°F
Clear
as of 11:56 AM MST
Rel. Humidity: 47%
Dew Point: 19°F
Visibility: 10 Miles
Pressure: 29.01 in.
Flight Rule: VFR
Wind Data
61 MPH
Gust: 83 MPH
250° West
Cloud Level(s): Clear
Dust on This Afternoon This Afternoon... Patchy blowing dust. Mostly sunny, with a temperature falling to around 36 by 5pm. Very windy, with a west wind 43 to 46 mph, with gusts as high as 60 mph.

Dust on Tonight Tonight... Patchy blowing dust before 8pm. Partly cloudy, with a low around 23. Windy, with a west wind 27 to 37 mph decreasing to 17 to 27 mph after midnight. Winds could gust as high as 49 mph.

Partly Sunny on Thursday Thursday... Partly sunny, with a high near 46. Southwest wind 16 to 20 mph, with gusts as high as 26 mph.

30% chance of rain Thursday Night Thursday Night... A 30 percent chance of rain, mainly after 5am. Mostly cloudy, with a low around 36. Windy, with a southwest wind 14 to 24 mph increasing to 24 to 34 mph after midnight. Winds could gust as high as 47 mph.

30% 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. Windy, with a west wind 29 to 34 mph decreasing to 21 to 26 mph in the afternoon. Winds could gust as high as 46 mph. Chance of precipitation is 30%. 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 20. West southwest wind around 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. West southwest wind 14 to 21 mph, with gusts as high as 28 mph.

Mostly Clear on Saturday Night Saturday Night... Mostly clear, with a low around 24. Southwest wind 17 to 20 mph, with gusts as high as 28 mph.

Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 40.

10% chance of snow Sunday Night Sunday Night... A slight chance of snow after 11pm. 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 40.

Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 22.

Partly Sunny on Tuesday Tuesday... Partly sunny, with a high near 39.

Current Radar Image


Sun Almanac for Portage, Montana
Sunrise: 08:08 AM
Sunset: 4:34 PM
Civil Sunrise:07:32 AM
Civil Sunset: 5:10 PM
Nautical Sunrise: 06:53 AM
Nautical Sunset: 5:49 PM
Astro Sunrise: 06:15 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.