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Dennison, Montana Weather Forecast
Dennison, Montana Weather
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Weather Forecast for Dennison, Montana : Lewis and Clark County
Issued: 9:27 pm MST Dec 16, 2025 Latitude: 46.9638315 Longitude: -111.9424954 View on Google Maps

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Tonight Wednesday Thursday Friday Saturday Sunday Monday Tuesday
30% chance of rain on Tonight 90% chance of rain & snow on Wednesday 30% chance of snow on Thursday 70% chance of rain & snow on Friday 10% chance of snow on Saturday Mostly Sunny on Sunday 20% chance of rain & snow on Monday 10% chance of rain & snow on Tuesday
Low: 46°F High: 32 °F High: 42°F High: 44°F High: 36°F High: 38°F High: 42°F High: 43°F
Low: 29°F Low: 36°F Low: 29°F Low: 26°F Low: 30°F Low: 29°F  
Rain Rain & Snow Snow Rain & Snow Snow Mostly Sunny Rain & Snow Rain & Snow
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Current Conditions at
HELENA - (KHLN)
52°
Clear
as of 9:53 PM MST
Rel. Humidity: 34%
Dew Point: 25°F
Visibility: 10 Miles
Pressure: 29.74 in.
Flight Rule: VFR
Wind Data
16 MPH
Gust: 24 MPH
270° West
Cloud Level(s): Clear
Current Conditions at
GREAT FALLS - (KGTF)
45°
Feels like 36°F
Clear
as of 9:53 PM MST
Rel. Humidity: 56%
Dew Point: 30°F
Visibility: 10 Miles
Pressure: 29.67 in.
Flight Rule: VFR
Wind Data
18 MPH
230° Southwest
Cloud Level(s): Clear
Current Conditions at
BUTTE - (KBTM)
43°
Clear
as of 9:53 PM MST
Rel. Humidity: 45%
Dew Point: 23°F
Visibility: 10 Miles
Pressure: 29.87 in.
Flight Rule: VFR
Wind Data
7 MPH
160° South
Cloud Level(s): Clear
30% chance of rain Tonight Tonight... A 30 percent chance of rain, mainly after 3am. Mostly cloudy, with a steady temperature around 46. South wind 18 to 20 mph, with gusts as high as 33 mph.
90% chance of rain & snow Wednesday Wednesday... Rain and snow before 11am, then a slight chance of snow after 2pm. Temperature falling to around 32 by 5pm. Windy, with a south wind 23 to 32 mph becoming west in the afternoon. Winds could gust as high as 49 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 29. Breezy, with a west wind 20 to 25 mph decreasing to 13 to 18 mph after midnight. Winds could gust as high as 40 mph.
30% chance of snow Thursday Thursday... A 30 percent chance of snow after 11am. Mostly cloudy, with a high near 42. South wind 9 to 14 mph, with gusts as high as 22 mph. Little or no snow accumulation expected.
70% chance of rain & snow Thursday Night Thursday Night... Rain likely, possibly mixed with snow before 11pm, then rain likely between 11pm and 5am, then rain and snow likely after 5am. Mostly cloudy, with a low around 36. South southwest wind 14 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
70% chance of rain & snow Friday Friday... Rain likely, possibly mixed with snow, becoming all snow after 11am. Mostly cloudy, with a high near 44. West wind around 15 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
50% chance of snow Friday Night Friday Night... A 50 percent chance of snow. Mostly cloudy, with a low around 29. West southwest wind 8 to 10 mph, with gusts as high as 20 mph. New snow accumulation of less than a half inch possible.
10% chance of snow Saturday Saturday... A slight chance of snow. Mostly sunny, with a high near 36. West southwest wind 8 to 14 mph, with gusts as high as 22 mph.
10% chance of snow Saturday Night Saturday Night... A slight chance of snow before 11pm. Partly cloudy, with a low around 26.
Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 38.
20% chance of rain & snow Sunday Night Sunday Night... A chance of rain and snow. Mostly cloudy, with a low around 30.
20% chance of rain & snow Monday Monday... A chance of rain and snow. Partly sunny, with a high near 42.
10% chance of rain & snow Monday Night Monday Night... A slight chance of rain and snow. Mostly cloudy, with a low around 29.
10% chance of rain & snow Tuesday Tuesday... A slight chance of rain and snow. Partly sunny, with a high near 43.
Current Radar Image


Sun Almanac for Dennison, Montana
Sunrise: 08:08 AM
Sunset: 4:40 PM
Civil Sunrise:07:33 AM
Civil Sunset: 5:15 PM
Nautical Sunrise: 06:54 AM
Nautical Sunset: 5:54 PM
Astro Sunrise: 06:17 AM
Astro Sunset: 6:31 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.