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.

Mostly Cloudy

32°F

0°C

Humidity	74%
Wind Speed	WSW 19 MPH
Barometer	29.82 in (1009.82 mb)
Dewpoint	25°F (-4°C)
Visibility	10.00 mi
Wind Chill	20°F (-7°C)
Last update	07 Dec 12:20 AM MST

More Information:

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

Extended Forecast for

Lewistown MT

Overnight
Low: 19 °F
Mostly Cloudy
Sunday
High: 39 °F
Mostly Sunny
Sunday Night
Low: 33 °F
Mostly Cloudy
Monday
High: 44 °F
Increasing
Clouds
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
Wednesday Night
Low: 11 °F
Snow Likely

Detailed Forecast

Overnight

Mostly cloudy, with a low around 19. West southwest wind 13 to 15 mph, with gusts as high as 26 mph.

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 steady temperature around 33. West southwest wind 11 to 16 mph, with gusts as high as 30 mph.

Monday

Increasing clouds, 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 50 percent 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. New snow accumulation of less than a half inch possible.

Wednesday

Rain and snow likely. Mostly cloudy, with a high near 41. South southwest wind 9 to 11 mph becoming west northwest in the afternoon. Winds could gust as high as 22 mph.

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.

Saturday

Partly sunny, with a high near 45.