PNS25-72: Soliciting Comments through December 19, 2025 on the Discontinuation of the Max/Min Temperature and Precipitation Table Product (RTP) for all NWS Alaska Region, Eastern Region, and Western Region Offices.

Lewistown, Lewistown Municipal Airport (KLWT)

Lat: 47.04917°NLon: 109.46639°WElev: 4167.0ft.

Overcast

19°F

-7°C

Humidity	85%
Wind Speed	N 0 MPH
Barometer	29.79 in (1008.81 mb)
Dewpoint	16°F (-9°C)
Visibility	10.00 mi
Last update	06 Dec 04:05 PM MST

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Lewistown MT

This Afternoon
High: 21 °F
Slight Chance
Snow
Tonight
Low: 21 °F⇑
Snow Likely
then Mostly
Cloudy
Sunday
High: 39 °F
Mostly Sunny
Sunday Night
Low: 27 °F
Mostly Cloudy
Monday
High: 44 °F
Partly Sunny
Monday Night
Low: 32 °F
Chance Rain
and Breezy
Tuesday
High: 46 °F
Chance
Rain/Snow and
Windy
Tuesday Night
Low: 24 °F
Chance Snow
Wednesday
High: 41 °F
Rain/Snow
Likely

Detailed Forecast

This Afternoon

A 20 percent chance of snow. Mostly cloudy, with a steady temperature around 21. Calm wind.

Tonight

Snow likely, mainly before 8pm. Mostly cloudy, with a temperature rising to around 29 by 5am. South southeast wind 6 to 15 mph becoming west after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

Sunday

Mostly sunny, with a high near 39. West wind 10 to 14 mph, with gusts as high as 24 mph.

Sunday Night

Mostly cloudy, with a low around 27. West southwest wind 11 to 16 mph, with gusts as high as 30 mph.

Monday

Partly sunny, with a high near 44. West wind 18 to 20 mph, with gusts as high as 32 mph.

Monday Night

A 30 percent chance of rain. Cloudy, with a low around 32. Breezy, with a southwest wind 16 to 22 mph, with gusts as high as 39 mph.

Tuesday

A chance of rain before 8am, then a chance of rain and snow. Mostly cloudy, with a high near 46. Windy, with a west northwest wind 25 to 30 mph, with gusts as high as 48 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.

Tuesday Night

A chance of snow. Mostly cloudy, with a low around 24. West northwest wind 9 to 14 mph becoming south southwest after midnight. Winds could gust as high as 25 mph.

Wednesday

Rain and snow likely. Mostly cloudy, with a high near 41.

Wednesday Night

Snow likely, mainly before 11pm. Mostly cloudy, with a low around 11.

Thursday

A chance of snow. Mostly cloudy, with a high near 21.

Thursday Night

A chance of snow. Mostly cloudy, with a low around 2.

Friday

A chance of snow. Mostly cloudy, with a high near 23.

Friday Night

A chance of snow. Mostly cloudy, with a low around 10.