National Weather Service

News Headlines

The Regional Temperatures and Precipitation Product for the State of Montana (RTPMT) will now be discontinued on July 7, 2026.

Current conditions at

Lewistown, Lewistown Municipal Airport (KLWT)

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

Mostly Cloudy

N/A

Humidity	72%
Wind Speed	W 8 MPH
Barometer	NA
Dewpoint	N/A
Visibility	10.00 mi
Last update	27 Jun 08:20 PM MDT

More Information:

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

Extended Forecast for

6 Miles SSE Lewistown Municipal MT

Today
High: 72 °F
Mostly Cloudy
Tonight
Low: 52 °F
Showers
Likely
Tuesday
High: 74 °F
Chance
Showers then
Showers
Likely
Tuesday Night
Low: 52 °F
Mostly Clear
Wednesday
High: 82 °F
Sunny then
Chance
T-storms
Wednesday Night
Low: 54 °F
Chance
T-storms then
Partly Cloudy
Thursday
High: 79 °F
Sunny
Thursday Night
Low: 53 °F
Mostly Clear
Friday
High: 83 °F
Sunny

Detailed Forecast

Today

Mostly cloudy, with a high near 72. Light and variable wind becoming east 5 to 10 mph in the afternoon. Winds could gust as high as 22 mph.

Tonight

Showers and thunderstorms likely, mainly before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 52. East southeast wind 5 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tuesday

Showers likely and possibly a thunderstorm before 2pm, then a chance of showers and thunderstorms, mainly between 2pm and 5pm. Partly sunny, with a high near 74. Light and variable wind becoming northwest 5 to 7 mph in the afternoon. Chance of precipitation is 70%.

Tuesday Night

Mostly clear, with a low around 52. Northwest wind around 6 mph becoming light and variable.

Wednesday

A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 82. South wind 5 to 7 mph becoming west northwest in the afternoon.

Wednesday Night

A 50 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 54. Light and variable wind becoming south southwest 5 to 7 mph in the evening.

Thursday

Sunny, with a high near 79. West southwest wind around 7 mph.

Thursday Night

Mostly clear, with a low around 53. North northwest wind 5 to 7 mph becoming southeast in the evening.

Friday

Sunny, with a high near 83.

Friday Night

Mostly clear, with a low around 57.

Saturday

Sunny, with a high near 89.

Saturday Night

Mostly clear, with a low around 59.