LEWISTOWN, MT 59457 Weather Forecast & Current Conditions

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LEWISTOWN, MT
Current Weather

5:54 AM MST JAN 2, 2026
Overcast
37°F
Feels Like: 30°F
Dewpoint: 28°F
Rel. Hum.: 69%
Visibility: 10 miles
Wind: W at 10 mph
Pressure: 29.70 inches
Last 72 hours

Local Area Snow Depth

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LEWISTOWN, MT 59457
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
REST OF TODAY
Partly cloudy. Haze. Highs 75 to 85. Southeast winds 5 to 15 mph.
TONIGHT
Cloudy with a 20 percent chance of rain showers. Haze through the night. Lows 50 to 60. North winds 5 to 15 mph.
WEDNESDAY
Mostly cloudy with a 20 percent chance of rain showers. Haze. Highs 65 to 75. Northwest winds 5 to 15 mph.
WEDNESDAY NIGHT
Cooler. Partly cloudy. Lows 45 to 50. North winds 5 to 10 mph shifting to the south after midnight.
THURSDAY
Partly cloudy. A 20 percent chance of thunderstorms in the afternoon. Highs 70 to 80. Southeast winds up to 10 mph.
THURSDAY NIGHT AND FRIDAY
Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Lows 50 to 55. Highs 65 to 75. Chance of precipitation 50 percent.
FRIDAY NIGHT
Partly cloudy. Lows 45 to 50.
SATURDAY
Partly cloudy with a 20 percent chance of rain showers. Highs 65 to 75.
SATURDAY NIGHT
Mostly cloudy with a 40 percent chance of rain showers. Lows 45 to 50.
SUNDAY
Partly cloudy with a 20 percent chance of rain showers. Highs 65 to 75.
SUNDAY NIGHT
Mostly cloudy with a 20 percent chance of rain showers. Lows 45 to 50.
MONDAY
Mostly cloudy with a 40 percent chance of rain showers. Highs 65 to 75.

Visible Weather Satellite
LEWISTOWN, MT 59457
Infrared Weather Satellite
LEWISTOWN, MT 59457
NEXRAD Weather Radar
LEWISTOWN, MT 59457

LEWISTOWN, MT 3 hourly weather forecast

weather forecast created  4:00 PM PST  1/ 1/2026
Friday
2 JAN 2026
LEWISTOWN, MT 59457 weather forecast Day 1, 0 hours 11 PM 35° 32° Mostly Cloudy 19%
RAIN
<.01 in
0% Thunder
( 0% severe)
SSW   3 57% 22°
Low 34° LEWISTOWN, MT 59457 weather forecast Day 1, 3 hours 2 AM 35° 32° Mostly Cloudy WSW   3 60% 23°
High 48° LEWISTOWN, MT 59457 weather forecast Day 1, 6 hours 5 AM 35° 32° Mostly Cloudy 20%
RAIN
<.01 in
0% Thunder
( 0% severe)
WSW   3 72% 27°

Mostly Cloudy

Chance of Rain

LEWISTOWN, MT 59457 weather forecast Day 1, 9 hours 8 AM 35° 30° Mostly Cloudy SW   6 78% 29°
LEWISTOWN, MT 59457 weather forecast Day 1, 12 hours 11 AM 42° 37° Mostly Cloudy 4%

0% Thunder
( 1% severe)
W   8 67% 32°
LEWISTOWN, MT 59457 weather forecast Day 1, 15 hours 2 PM 46° 41° Mostly Cloudy W   12 58% 32°
LEWISTOWN, MT 59457 weather forecast Day 1, 18 hours 5 PM 42° 36° Mostly Cloudy 4%

0% Thunder
( 1% severe)
WSW   12 67% 32°
LEWISTOWN, MT 59457 weather forecast Day 1, 21 hours 8 PM 40° 33° Mostly Cloudy WSW   12 70% 31°
Saturday
3 JAN 2026
LEWISTOWN, MT 59457 weather forecast Day 2, 0 hours 11 PM 37° 30° Partly Cloudy 2%

0% Thunder
( 0% severe)
WSW   9 79% 31°
Low 30° LEWISTOWN, MT 59457 weather forecast Day 2, 3 hours 2 AM 36° 30° Partly Cloudy WSW   7 79% 30°
High 51° LEWISTOWN, MT 59457 weather forecast Day 2, 6 hours 5 AM 35° 29° Mostly Cloudy 0%

0% Thunder
( 0% severe)
SW   7 78% 29°

Mostly Cloudy



LEWISTOWN, MT 59457 weather forecast Day 2, 9 hours 8 AM 36° 30° Mostly Cloudy S   8 72% 28°
LEWISTOWN, MT 59457 weather forecast Day 2, 12 hours 11 AM 45° 41° Partly Cloudy 0%

0% Thunder
( 0% severe)
S   8 58% 31°
LEWISTOWN, MT 59457 weather forecast Day 2, 15 hours 2 PM 50° 46° Partly Cloudy SSW   10 46% 30°
LEWISTOWN, MT 59457 weather forecast Day 2, 18 hours 5 PM 43° 37° Partly Cloudy 0%

0% Thunder
( 0% severe)
SSW   10 57% 29°
LEWISTOWN, MT 59457 weather forecast Day 2, 21 hours 8 PM 40° 33° Mostly Cloudy SSW   12 64% 29°

LEWISTOWN, MT extended weather forecast

Sunday
4 JAN 2026
Monday
5 JAN 2026
Tuesday
6 JAN 2026
Wednesday
7 JAN 2026
Thursday
8 JAN 2026
Low 36° Low 33° Low 30° Low 26° Low 19°
High 57° High 52° High 44° High 44° High 38°
LEWISTOWN, MT 59457 weather forecast Day 3 LEWISTOWN, MT 59457 weather forecast Day 4 LEWISTOWN, MT 59457 weather forecast Day 5 LEWISTOWN, MT 59457 weather forecast Day 6 LEWISTOWN, MT 59457 weather forecast Day 7
Mostly Cloudy
1% Rain/Snow
Overcast
6% Rain/Snow
Overcast
22% Snow
Overcast
13% Snow
Mostly Cloudy
11% Snow
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