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Truly, Montana Weather Forecast
Truly, Montana Weather
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Weather Forecast for Truly, Montana : Cascade County
Issued: 4:03 am MST Dec 17, 2025 Latitude: 47.3557881 Longitude: -111.4413577 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Thursday Friday Saturday Sunday Monday Tuesday
60% chance of rain on Today Cloudy on Tonight Mostly Cloudy on Thursday 40% 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: 26°F High: 47°F High: 49°F High: 41°F High: 43°F High: 43°F High: 43°F
Low: 37°F Low: 23°F Low: 25°F Low: 27°F Low: 25°F  
Rain Cloudy Mostly Cloudy Rain & Snow Mostly Sunny Mostly Sunny Rain & Snow Partly Sunny
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Current Conditions at
GREAT FALLS - (KGTF)
52°
Clear
as of 6:53 AM MST
Rel. Humidity: 43%
Dew Point: 30°F
Visibility: 10 Miles
Pressure: 29.12 in.
Flight Rule: VFR
Wind Data
16 MPH
Gust: 24 MPH
220° Southwest
Cloud Level(s): Clear
Current Conditions at
HELENA - (KHLN)
50°
Feels like 42°F
Mostly Cloudy
as of 6:53 AM MST
Rel. Humidity: 53%
Dew Point: 34°F
Visibility: 10 Miles
Pressure: 29.21 in.
Flight Rule: VFR
Wind Data
26 MPH
Gust: 43 MPH
190° South
Cloud Level(s): Scattered at 6500ft, Broken at 9000ft
Current Conditions at
LEWISTOWN - (KLWT)
50°
Feels like 43°F
Mostly Clear
as of 6:54 AM MST
Rel. Humidity: 39%
Dew Point: 27°F
Visibility: 10 Miles
Pressure: 29.23 in.
Flight Rule: VFR
Wind Data
21 MPH
Gust: 32 MPH
220° Southwest
Cloud Level(s): Few at 12000ft
60% chance of rain Today Today... Rain likely, mainly before 10am. Patchy blowing dust. Mostly cloudy, then gradually becoming sunny, with a temperature falling to around 36 by 5pm. Very windy, with a west wind 28 to 33 mph increasing to 41 to 46 mph in the afternoon. Winds could gust as high as 60 mph. Chance of precipitation is 60%.

Cloudy on Tonight Tonight... Partly cloudy, with a low around 26. Windy, with a west wind 26 to 31 mph decreasing to 15 to 20 mph after midnight. Winds could gust as high as 46 mph.

Mostly Cloudy on Thursday Thursday... Mostly cloudy, with a high near 47. South southwest wind 15 to 17 mph, with gusts as high as 26 mph.

40% chance of rain & snow Thursday Night Thursday Night... A slight chance of rain and snow before 11pm, then a chance of rain between 11pm and 5am, then a chance of rain and snow after 5am. Mostly cloudy, with a low around 37. Breezy, with a south southwest wind 15 to 20 mph increasing to 23 to 28 mph in the evening. Winds could gust as high as 43 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.

40% chance of rain & snow Friday Friday... A chance of rain and snow before 11am, then a chance of snow. Partly sunny, with a high near 49. Breezy, with a west wind 22 to 26 mph, with gusts as high as 40 mph. Chance of precipitation is 40%. 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 23. West southwest wind 11 to 14 mph, with gusts as high as 22 mph. Little or no snow accumulation expected.

Mostly Sunny on Saturday Saturday... Mostly sunny, with a high near 41. Breezy, with a west southwest wind 13 to 22 mph, with gusts as high as 33 mph.

Cloudy on Saturday Night Saturday Night... Partly cloudy, with a low around 25. South southwest wind 14 to 16 mph, with gusts as high as 26 mph.

Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 43.

20% chance of rain & snow Sunday Night Sunday Night... A chance of rain and snow after 11pm. Mostly cloudy, with a low around 27.

10% chance of rain & snow Monday Monday... A slight chance of rain and snow. Partly sunny, with a high near 43.

10% chance of rain & snow Monday Night Monday Night... A slight chance of rain and snow. Partly cloudy, with a low around 25.

Partly Sunny on Tuesday Tuesday... Partly sunny, with a high near 43.

Current Radar Image


Sun Almanac for Truly, Montana
Sunrise: 08:08 AM
Sunset: 4:36 PM
Civil Sunrise:07:32 AM
Civil Sunset: 5:12 PM
Nautical Sunrise: 06:53 AM
Nautical Sunset: 5:51 PM
Astro Sunrise: 06:16 AM
Astro Sunset: 6:28 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.