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Porters Corner, Montana Weather Forecast
Porters Corner, Montana Weather
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Weather Forecast for Porters Corner, Montana : Granite County
Issued: 11:16 am MST Dec 17, 2025 Latitude: 46.2518692 Longitude: -113.3320077 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Thursday Friday Saturday Sunday Monday Tuesday
40% chance of blowing snow on This Afternoon Mostly Cloudy on Tonight 80% chance of snow on Thursday 100% chance of rain & snow on Friday 30% chance of snow on Saturday 10% chance of snow on Sunday 20% chance of rain & snow on Monday 10% chance of snow on Tuesday
High: 44°F Low: 21°F High: 39°F High: 42°F High: 31°F High: 39°F High: 41°F High: 40°F
Low: 32°F Low: 19°F Low: 18°F Low: 24°F Low: 22°F  
Blowing Snow Mostly Cloudy Snow Rain & Snow Snow Snow Rain & Snow Snow
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Current Conditions at
BUTTE - (KBTM)
37°
Feels like 25°F
Clear
as of 11:53 AM MST
Rel. Humidity: 34%
Dew Point: 12°F
Visibility: 10 Miles
Pressure: 29.47 in.
Flight Rule: VFR
Wind Data
25 MPH
Gust: 46 MPH
270° West
Cloud Level(s): Clear
Current Conditions at
MISSOULA - (KMSO)
39°
Feels like 30°F
Cloudy
as of 11:53 AM MST
Rel. Humidity: 48%
Dew Point: 21°F
Visibility: 10 Miles
Pressure: 29.60 in.
Flight Rule: VFR
Wind Data
17 MPH
Gust: 29 MPH
270° West
Cloud Level(s): Few at 5000ft, Broken at 6000ft, Solid Overcast 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
40% chance of blowing snow This Afternoon This Afternoon... A 40 percent chance of snow, mainly between 2pm and 3pm. Patchy blowing snow. Mostly cloudy, with a high near 44. Windy, with a west wind 31 to 34 mph, with gusts as high as 49 mph. Total daytime snow accumulation of less than a half inch possible.
Mostly Cloudy on Tonight Tonight... Mostly cloudy, with a low around 21. Breezy, with a west wind 19 to 24 mph becoming south southwest 7 to 12 mph after midnight. Winds could gust as high as 32 mph.
80% chance of snow Thursday Thursday... Snow after 11am. High near 39. South southwest wind 6 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
100% chance of rain & snow Thursday Night Thursday Night... Snow before 8pm, then rain and snow. Snow level 5500 feet rising to 6600 feet. Low around 32. South southwest wind 14 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
100% chance of rain & snow Friday Friday... Rain and snow, becoming all snow after 11am. High near 42. West wind 13 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New snow accumulation of less than one inch possible.
60% chance of snow Friday Night Friday Night... Snow likely, mainly before 11pm. Mostly cloudy, with a low around 19. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
30% chance of snow Saturday Saturday... A 30 percent chance of snow. Partly sunny, with a high near 31. Little or no snow accumulation expected.
Mostly Cloudy on Saturday Night Saturday Night... Mostly cloudy, with a low around 18.
10% chance of snow Sunday Sunday... A slight chance of snow after 11am. Partly sunny, with a high near 39.
20% chance of rain & snow Sunday Night Sunday Night... A slight chance of snow before 11pm, then a chance of rain and snow. Snow level 5500 feet. Mostly cloudy, with a low around 24.
20% chance of rain & snow Monday Monday... A chance of rain and snow. Snow level 5400 feet. Mostly cloudy, with a high near 41.
10% chance of snow Monday Night Monday Night... A slight chance of snow. Mostly cloudy, with a low around 22.
10% chance of snow Tuesday Tuesday... A slight chance of snow. Partly sunny, with a high near 40.
Sun Almanac for Porters Corner, Montana
Sunrise: 08:11 AM
Sunset: 4:48 PM
Civil Sunrise:07:36 AM
Civil Sunset: 5:23 PM
Nautical Sunrise: 06:58 AM
Nautical Sunset: 6:01 PM
Astro Sunrise: 06:22 AM
Astro Sunset: 6:38 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.