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.

Partly Cloudy

37°F

3°C

Humidity	60%
Wind Speed	W 8 MPH
Barometer	30.04 in (1017.27 mb)
Dewpoint	25°F (-4°C)
Visibility	10.00 mi
Wind Chill	31°F (-1°C)
Last update	22 Nov 01:05 AM MST

More Information:

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

Extended Forecast for

Lewistown MT

Overnight
Low: 29 °F
Mostly Cloudy
Saturday
High: 56 °F
Partly Sunny
Saturday Night
Low: 33 °F
Partly Cloudy
Sunday
High: 59 °F
Increasing
Clouds
Sunday Night
Low: 33 °F
Chance Rain
Monday
High: 43 °F
Breezy.
Chance
Rain/Snow
then Chance
Snow
Monday Night
Low: 16 °F
Chance Snow
then Mostly
Cloudy
Tuesday
High: 32 °F
Mostly Sunny
Tuesday Night
Low: 14 °F
Mostly Cloudy

Detailed Forecast

Overnight

Mostly cloudy, with a low around 29. Southwest wind around 8 mph.

Saturday

Partly sunny, with a high near 56. South wind around 8 mph becoming west in the afternoon.

Saturday Night

Partly cloudy, with a low around 33. South wind around 8 mph.

Sunday

Increasing clouds, with a high near 59. South wind 6 to 8 mph becoming west in the afternoon.

Sunday Night

A 30 percent chance of rain, mainly after 5am. Mostly cloudy, with a low around 33. Southwest wind 5 to 7 mph.

Monday

A chance of rain before 8am, then a chance of snow. Mostly cloudy, with a high near 43. Breezy, with a west wind 10 to 15 mph increasing to 19 to 24 mph in the afternoon. Winds could gust as high as 36 mph. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.

Monday Night

A 30 percent chance of snow before 11pm. Mostly cloudy, with a low around 16. West northwest wind 13 to 21 mph, with gusts as high as 33 mph. New snow accumulation of less than a half inch possible.

Tuesday

Mostly sunny, with a high near 32. West northwest wind 8 to 10 mph, with gusts as high as 18 mph.

Tuesday Night

Mostly cloudy, with a low around 14.

Wednesday

A slight chance of snow after 11am. Partly sunny, with a high near 37.

Wednesday Night

A chance of snow. Mostly cloudy, with a low around 20.

Thanksgiving Day

A chance of rain and snow. Mostly cloudy, with a high near 42.

Thursday Night

A chance of rain and snow. Mostly cloudy, with a low around 22.