Lewistown, MT Weather Forecast & Alerts

Current conditions, 5-day forecast, and active NWS weather alerts for Lewistown, MT.

Current conditions are temporarily unavailable for LEWISTOWN, MONTANA. No nearby METAR station found.

5-Day Forecast — Lewistown, MT

Thursday

High 39 °F
Snow Likely
Thursday
Night
Low 21 °F
Snow Likely
Friday

High 35 °F
Chance of Snow
Friday
Night
Low 19 °F
Forecast Missing
Saturday

High 39 °F
Forecast Missing
Saturday
Night
Low 19 °F
Forecast Missing
Sunday

High 41 °F
Forecast Missing
Sunday
Night
Low 23 °F
Forecast Missing
Monday

High 46 °F
Forecast Missing

Detailed Forecast — Lewistown, MT

Thursday
Snow Likely. High near 39°F. Wind 17 to 22 mph, with gusts as high as 33 mph.
Thursday Night
Snow Likely. Low around 21°F. Wind 9 to 15 mph, with gusts as high as 24 mph.
Friday
Chance of Snow. High near 35°F. Wind 20 to 24 mph, with gusts as high as 36 mph.
Friday Night
Chance of Snow. Low around 19°F. Wind 10 to 21 mph, with gusts as high as 33 mph.
Saturday
Forecast Missing. High near 39°F. Wind 9 to 12 mph, with gusts as high as 20 mph.
Saturday Night
Forecast Missing. Low around 19°F. Wind around 3 mph, with gusts as high as 9 mph.
Sunday
Forecast Missing. High near 41°F. Wind 7 to 8 mph, with gusts as high as 16 mph.
Sunday Night
Forecast Missing. Low around 23°F. Wind 2 to 3 mph, with gusts as high as 8 mph.
Monday
Forecast Missing. High near 46°F. Wind 3 to 6 mph, with gusts as high as 12 mph.
Monday Night
Forecast Missing. Low around 28°F. Wind around 5 mph, with gusts as high as 9 mph.
Tuesday
Forecast Missing. High near 55°F. Wind 8 to 9 mph, with gusts as high as 17 mph.
Tuesday Night
Forecast Missing. Low around 30°F. Wind around 3 mph, with gusts as high as 9 mph.
Wednesday
Forecast Missing. High near 55°F. Wind 8 to 10 mph, with gusts as high as 18 mph.
MT Radar
Current Radar • MT
Day 1 Outlook • April 23, 2026

Observation History — Lewistown, MT

Time Wind
(mph)
Vis
(mi)
Weather Precip (in) Temperature (F) Relative
Humidity
Wind
Chill
(F)
Heat
Index
(F)
Pressure
Air Dwpt altimeter
(in)
sea level
(mb)

Regional Weather Observation

(KLWT)


F

DELTA (K1DM)

Light Rain
32.0 F

ECHO (K1EM)

Cloudy
32.0 F

CHARLIE (K1CM)

Light Snow and Fog/Mist
28.4 F

BRAVO (K1BM)

Light Snow
30.7 F

ALPHA (K1AM)

Light Snow
30.2 F
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