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

48°F

9°C

Humidity	31%
Wind Speed	SW 12 MPH
Barometer	29.92 in (1013.21 mb)
Dewpoint	19°F (-7°C)
Visibility	10.00 mi
Wind Chill	43°F (6°C)
Last update	23 Nov 08:20 AM MST

More Information:

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

Extended Forecast for

Lewistown MT

Today
High: 57 °F
Mostly Cloudy
Tonight
Low: 34 °F
Slight Chance
Rain
Monday
High: 43 °F⇓
Rain then
Rain/Snow
Likely and
Breezy
Monday Night
Low: 17 °F
Chance Snow
and Blustery
then Mostly
Cloudy
Tuesday
High: 35 °F
Mostly Sunny
Tuesday Night
Low: 15 °F
Partly Cloudy
Wednesday
High: 36 °F
Slight Chance
Snow
Wednesday Night
Low: 23 °F
Chance Snow
Thanksgiving Day
High: 42 °F
Snow Likely
then Chance
Rain/Snow

Detailed Forecast

Today

Mostly cloudy, with a high near 57. South southwest wind 8 to 10 mph becoming west in the afternoon. Winds could gust as high as 18 mph.

Tonight

A 20 percent chance of rain after 11pm. Cloudy, with a low around 34. South wind around 7 mph.

Monday

Rain before 2pm, then snow likely. Temperature rising to near 43 by 10am, then falling to around 34 during the remainder of the day. Breezy, with a southwest wind 10 to 15 mph becoming west northwest 23 to 28 mph in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

Monday Night

A 40 percent chance of snow before 11pm. Mostly cloudy, with a low around 17. Blustery, with a west northwest wind 23 to 28 mph decreasing to 14 to 19 mph after midnight. Winds could gust as high as 40 mph. New snow accumulation of less than a half inch possible.

Tuesday

Mostly sunny, with a high near 35. West northwest wind 6 to 8 mph.

Tuesday Night

Partly cloudy, with a low around 15. Calm wind becoming south around 5 mph.

Wednesday

A 20 percent chance of snow after 11am. Mostly cloudy, with a high near 36. Light and variable wind.

Wednesday Night

A chance of snow. Cloudy, with a low around 23. Light south southeast wind.

Thanksgiving Day

Snow likely before 2pm, then a chance of rain and snow. Mostly cloudy, with a high near 42.

Thursday Night

A chance of rain and snow before 2am, then a chance of snow. Mostly cloudy, with a low around 22.