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Lewistown, Montana Weather Forecast
Lewistown, Montana Weather
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Weather Forecast for Lewistown, Montana : Fergus County
Issued: 9:43 pm MST Dec 17, 2025 Latitude: 47.0624732 Longitude: -109.428238 View on Google Maps

MouseOver for Detail Forecast
Tonight Thursday Friday Saturday Sunday Monday Tuesday Wednesday
20% chance of snow on Tonight Increasing Clouds on Thursday 40% chance of rain & snow on Friday Mostly Sunny on Saturday Partly Sunny on Sunday 20% chance of rain & snow on Monday 10% chance of snow on Tuesday 10% chance of rain & snow on Wednesday
Low: 17°F High: 41°F High: 48°F High: 37°F High: 44°F High: 44°F High: 43°F High: 46°F
Low: 33 °F Low: 20°F Low: 23°F Low: 29°F Low: 24°F Low: 26°F  
Snow Increasing Clouds Rain & Snow Mostly Sunny Partly Sunny Rain & Snow Snow Rain & Snow
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Current Conditions at
LEWISTOWN - (KLWT)
25°
Feels like 11°F
Cloudy
as of 8:54 PM MST
Rel. Humidity: 79%
Dew Point: 19°F
Visibility: 10 Miles
Pressure: 29.68 in.
Flight Rule: VFR
Wind Data
18 MPH
Gust: 36 MPH
310° Northwest
Cloud Level(s): Solid Overcast at 7500ft
Current Conditions at
GREAT FALLS - (KGTF)
19°
Clear
as of 8:53 PM MST
Rel. Humidity: 85%
Dew Point: 16°F
Visibility: 10 Miles
Pressure: 29.82 in.
Flight Rule: VFR
Wind Data
6 MPH
040° Northeast
Cloud Level(s): Clear
Current Conditions at
BILLINGS - (KBIL)
39°
Feels like 27°F
Mostly Cloudy
as of 8:53 PM MST
Rel. Humidity: 29%
Dew Point: 10°F
Visibility: 10 Miles
Pressure: 29.65 in.
Flight Rule: VFR
Wind Data
31 MPH
Gust: 52 MPH
280° West
Cloud Level(s): Broken at 20000ft
20% chance of snow Tonight Tonight... A 20 percent chance of snow before 1am. Partly cloudy, with a low around 17. Windy, with a west northwest wind 21 to 31 mph decreasing to 11 to 21 mph after midnight. Winds could gust as high as 50 mph.

Increasing Clouds on Thursday Thursday... Increasing clouds, with a high near 41. Southwest wind 7 to 13 mph, with gusts as high as 23 mph.

20% chance of snow Thursday Night Thursday Night... A slight chance of snow, mixing with rain after 8pm, then gradually ending. Mostly cloudy, with a temperature falling to near 33 by 9pm, then rising to around 45 during the remainder of the night. Southwest wind 16 to 21 mph, with gusts as high as 36 mph. Chance of precipitation is 20%.

40% chance of rain & snow Friday Friday... A slight chance of rain before 8am, then a slight chance of rain and snow between 8am and 11am, then a chance of snow after 11am. Mostly cloudy, with a high near 48. West southwest wind 15 to 20 mph, with gusts as high as 34 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 before 11pm. Partly cloudy, with a low around 20. West wind around 10 mph, with gusts as high as 20 mph. Little or no snow accumulation expected.

Mostly Sunny on Saturday Saturday... Mostly sunny, with a high near 37. West wind 10 to 17 mph, with gusts as high as 28 mph.

Cloudy on Saturday Night Saturday Night... Partly cloudy, with a low around 23. South southwest wind around 11 mph, with gusts as high as 22 mph.

Partly Sunny on Sunday Sunday... Partly sunny, with a high near 44. South southwest wind 6 to 9 mph.

10% chance of rain & snow Sunday Night Sunday Night... A slight chance of rain and snow after 11pm. Mostly cloudy, with a low around 29.

20% chance of rain & snow Monday Monday... A chance of rain and snow, mainly before 11am. Mostly cloudy, with a high near 44.

10% chance of rain & snow Monday Night Monday Night... A slight chance of rain and snow. Mostly cloudy, with a low around 24.

10% chance of snow Tuesday Tuesday... A slight chance of snow. Partly sunny, with a high near 43.

10% chance of rain Tuesday Night Tuesday Night... A slight chance of rain. Mostly cloudy, with a low around 26.

10% chance of rain & snow Wednesday Wednesday... A slight chance of rain and snow. Partly sunny, with a high near 46.

Current Radar Image


Sun Almanac for Lewistown, Montana
Sunrise: 07:59 AM
Sunset: 4:30 PM
Civil Sunrise:07:24 AM
Civil Sunset: 5:05 PM
Nautical Sunrise: 06:45 AM
Nautical Sunset: 5:44 PM
Astro Sunrise: 06:08 AM
Astro Sunset: 6:21 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.