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Day 1 Outlook • April 20, 2026
Day 2 Outlook • April 21, 2026
Day 3 Outlook • April 22, 2026
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Hazardous Weather Conditions

  • No active alerts for LEWISTOWN, MONTANA

Current Conditions: LEWISTOWN, MONTANA

(KLWT)

F
Humidity:%
Wind Speed: G mph
Barometer: in
Dewpoint: F
Visibility: mi
Precip:--
Heat Index: F
Wind Chill: F
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5 Day Forecast for LEWISTOWN, MONTANA (59457)

Monday

High 73 °F
Partly Sunny
Monday
Night
Low 44 °F
Partly Cloudy
Tuesday

High 80 °F
Partly Sunny
Tuesday
Night
Low 50 °F
Mostly Cloudy
Wednesday

High 73 °F
T-storms Likely
Wednesday
Night
Low 28 °F
Snow
Thursday

High 39 °F
Snow Likely
Thursday
Night
Low 23 °F
Chance of Snow
Friday

High 39 °F
Chance of Snow

Detailed Forecast for LEWISTOWN, MONTANA (59457)

Monday
Partly Sunny. High near 73°F. Wind 3 to 6 mph, with gusts as high as 14 mph.
Monday Night
Partly Cloudy. Low around 44°F. Wind 5 to 6 mph, with gusts as high as 13 mph.
Tuesday
Partly Sunny. High near 80°F. Wind 3 to 8 mph, with gusts as high as 16 mph.
Tuesday Night
Mostly Cloudy. Low around 50°F. Wind 7 to 9 mph, with gusts as high as 16 mph.
Wednesday
Thunderstorms Likely. High near 73°F. Wind 10 to 18 mph, with gusts as high as 29 mph.
Wednesday Night
Snow. Low around 28°F. Wind 26 to 30 mph, with gusts as high as 39 mph.
Thursday
Snow Likely. High near 39°F. Wind 23 to 30 mph, with gusts as high as 41 mph.
Thursday Night
Chance of Snow. Low around 23°F. Wind 12 to 13 mph, with gusts as high as 21 mph.
Friday
Chance of Snow. High near 39°F. Wind 14 to 17 mph, with gusts as high as 28 mph.
Friday Night
Slight Chance of Snow. Low around 19°F. Wind around 6 mph, with gusts as high as 12 mph.
Saturday
Chance of Snow. High near 41°F. Wind 10 to 12 mph, with gusts as high as 20 mph.
Saturday Night
Partly Cloudy. Low around 21°F. Wind 5 to 6 mph, with gusts as high as 10 mph.
Sunday
Slight Chance of Snow. High near 46°F. Wind 8 to 9 mph, with gusts as high as 17 mph.
MT Radar
Current Radar • MT
Day 1 Outlook • April 20, 2026

Observation History for LEWISTOWN, MONTANA

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)

Clear
43.7 F

ECHO (K1EM)

Mostly Cloudy
53.8 F

CHARLIE (K1CM)

Partly Cloudy
48.7 F

BRAVO (K1BM)

Cloudy
47.1 F

ALPHA (K1AM)

Clear
50.0 F
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