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McGillvary, Montana Weather Forecast
McGillvary, Montana Weather
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Click for High Wind Warning for McGillvary, Montana
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Weather Forecast for McGillvary, Montana : Powell County
Issued: 1:01 am MST Dec 17, 2025 Latitude: 46.6607674 Longitude: -112.594477 View on Google Maps

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Today Tonight Thursday Friday Saturday Sunday Monday Tuesday
50% chance of blowing snow on Today Blowing Snow on Tonight 60% chance of snow on Thursday 90% chance of rain & snow on Friday 40% chance of snow on Saturday Partly Sunny on Sunday 20% chance of rain & snow on Monday 10% chance of snow on Tuesday
High: 26 °F Low: 21°F High: 37°F High: 39°F High: 30°F High: 34°F High: 38°F High: 36°F
Low: 30°F Low: 20°F Low: 18°F Low: 23°F Low: 20°F  
Blowing Snow Blowing Snow Snow Rain & Snow Snow Partly Sunny Rain & Snow Snow
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Current Conditions at
HELENA - (KHLN)
46°
Feels like 40°F
Cloudy
Rain
as of 8:53 AM MST
Rel. Humidity: 81%
Dew Point: 41°F
Visibility: 5 Miles
Pressure: 29.20 in.
Flight Rule: MVFR
Wind Data
15 MPH
Gust: 24 MPH
250° West
Cloud Level(s): Few at 1800ft, Solid Overcast at 3800ft
Current Conditions at
BUTTE - (KBTM)
39°
Feels like 28°F
Cloudy
Rain Mist
as of 9:00 AM MST
Rel. Humidity: 86%
Dew Point: 36°F
Visibility: 3 Miles
Pressure: 29.32 in.
Flight Rule: MVFR
Wind Data
23 MPH
Gust: 52 MPH
220° Southwest
Cloud Level(s): Solid Overcast at 1800ft
Current Conditions at
MISSOULA - (KMSO)
45°
Feels like 33°F
Mostly Cloudy
Squalls
as of 8:53 AM MST
Rel. Humidity: 45%
Dew Point: 25°F
Visibility: 10 Miles
Pressure: 29.39 in.
Flight Rule: VFR
Wind Data
37 MPH
Gust: 61 MPH
260° West
Cloud Level(s): Few at 5500ft, Broken at 8000ft
Current Conditions at
GREAT FALLS - (KGTF)
43°
Feels like 34°F
Mostly Cloudy
Light Rain
as of 9:00 AM MST
Rel. Humidity: 93%
Dew Point: 41°F
Visibility: 10 Miles
Pressure: 29.11 in.
Flight Rule: VFR
Wind Data
21 MPH
Gust: 26 MPH
220° Southwest
Cloud Level(s): Scattered at 4000ft, Broken at 9500ft, Broken at 11000ft
50% chance of blowing snow Today Today... A chance of snow before 1pm, then a slight chance of snow after 3pm. Patchy blowing snow before 11am, then patchy blowing snow after 3pm. Partly sunny, with a temperature falling to around 26 by 5pm. Windy, with a west wind 25 to 30 mph increasing to 35 to 40 mph in the morning. Winds could gust as high as 55 mph. Chance of precipitation is 50%. Total daytime snow accumulation of less than a half inch possible.
Blowing Snow on Tonight Tonight... Patchy blowing snow before 11pm. Mostly cloudy, with a low around 21. Windy, with a west wind 24 to 34 mph decreasing to 10 to 20 mph. Winds could gust as high as 48 mph.
60% chance of snow Thursday Thursday... Snow likely after 11am. Mostly cloudy, with a high near 37. South southwest wind 6 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
90% chance of rain & snow Thursday Night Thursday Night... Snow before 8pm, then rain and snow. Snow level rising to 5900 feet. Low around 30. South southwest wind 13 to 18 mph, with gusts as high as 31 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
90% chance of rain & snow Friday Friday... Rain and snow, becoming all snow after 8am. High near 39. West wind 15 to 17 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
60% chance of snow Friday Night Friday Night... Snow likely, mainly before 11pm. Mostly cloudy, with a low around 20. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
40% chance of snow Saturday Saturday... A 40 percent chance of snow. Partly sunny, with a high near 30. Little or no snow accumulation expected.
Cloudy on Saturday Night Saturday Night... Partly cloudy, with a low around 18.
Partly Sunny on Sunday Sunday... Partly sunny, with a high near 34.
20% chance of snow Sunday Night Sunday Night... A chance of snow. Mostly cloudy, with a low around 23.
20% chance of rain & snow Monday Monday... A chance of rain and snow. Snow level 5700 feet lowering to 5200 feet. Mostly cloudy, with a high near 38.
20% chance of snow Monday Night Monday Night... A chance of snow. Mostly cloudy, with a low around 20.
10% chance of snow Tuesday Tuesday... A slight chance of snow. Partly sunny, with a high near 36.
Current Radar Image


Sun Almanac for McGillvary, Montana
Sunrise: 08:10 AM
Sunset: 4:44 PM
Civil Sunrise:07:35 AM
Civil Sunset: 5:19 PM
Nautical Sunrise: 06:56 AM
Nautical Sunset: 5:57 PM
Astro Sunrise: 06:19 AM
Astro Sunset: 6:34 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.