LEWISTOWN, MT 59457 Weather Forecast & Current Conditions

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LEWISTOWN, MT
Current Weather

3:54 AM MDT JUL 30, 2026
Clear
63°F
Feels Like: 64°F
Dewpoint: 52°F
Rel. Hum.: 67%
Visibility: 10 miles
Wind: SSW at 3 mph
Pressure: 29.98 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 AM PST 10/25/2026
Sunday
25 OCT 2026
LEWISTOWN, MT 59457 weather forecast Day 1, 12 hours 11 AM 36° 32° Clear 0%

0% Thunder
( 0% severe)
E   5 69% 27°
High 43° LEWISTOWN, MT 59457 weather forecast Day 1, 15 hours 2 PM 42° 36° Clear E   10 55% 27°
Clear



LEWISTOWN, MT 59457 weather forecast Day 1, 18 hours 5 PM 36° 28° Clear 0%

0% Thunder
( 0% severe)
ESE   13 66% 26°
LEWISTOWN, MT 59457 weather forecast Day 1, 21 hours 8 PM 30° 21° Clear ESE   10 70% 22°
Monday
26 OCT 2026
LEWISTOWN, MT 59457 weather forecast Day 2, 0 hours 11 PM 30° 21° Clear 0%

0% Thunder
( 0% severe)
ESE   10 67% 21°
Low 24° LEWISTOWN, MT 59457 weather forecast Day 2, 3 hours 2 AM 28° 20° Partly Cloudy ESE   8 76% 22°
High 50° LEWISTOWN, MT 59457 weather forecast Day 2, 6 hours 5 AM 28° 21° Partly Cloudy 1%

0% Thunder
( 0% severe)
ESE   7 84% 24°

Partly Cloudy



LEWISTOWN, MT 59457 weather forecast Day 2, 9 hours 8 AM 31° 24° Partly Cloudy ESE   7 81% 26°
LEWISTOWN, MT 59457 weather forecast Day 2, 12 hours 11 AM 43° 39° Clear 1%

0% Thunder
( 0% severe)
ESE   6 68% 33°
LEWISTOWN, MT 59457 weather forecast Day 2, 15 hours 2 PM 50° 47° Partly Cloudy ESE   7 54% 34°
LEWISTOWN, MT 59457 weather forecast Day 2, 18 hours 5 PM 42° 37° Partly Cloudy 2%

0% Thunder
( 0% severe)
ESE   8 67% 32°
LEWISTOWN, MT 59457 weather forecast Day 2, 21 hours 8 PM 35° 27° Partly Cloudy ESE   10 85% 31°
Tuesday
27 OCT 2026
LEWISTOWN, MT 59457 weather forecast Day 3, 0 hours 11 PM 35° 29° Mostly Cloudy 31%
RAIN
.1–.25 in
0% Thunder
( 3% severe)
ESE   7 85% 31°
Low 28° LEWISTOWN, MT 59457 weather forecast Day 3, 3 hours 2 AM 33° 30° Mostly Cloudy SE   3 92% 31°
High 45° LEWISTOWN, MT 59457 weather forecast Day 3, 6 hours 5 AM 34° 31° Mostly Cloudy 54%
RAIN
***
0% Thunder
( 3% severe)
SW   3 89% 31°

Mostly Cloudy

Rain Likely

LEWISTOWN, MT 59457 weather forecast Day 3, 9 hours 8 AM 35° 31° Mostly Cloudy W   5 89% 32°
LEWISTOWN, MT 59457 weather forecast Day 3, 15 hours 11 AM 40° 32° Mostly Cloudy 46%
RAIN
***
0% Thunder
( 1% severe)
W   14 79% 34°
LEWISTOWN, MT 59457 weather forecast Day 3, 18 hours 2 PM 45° 37° Mostly Cloudy W   22 60% 32°
LEWISTOWN, MT 59457 weather forecast Day 3, 21 hours 5 PM 40° 32° Mostly Cloudy     W   15 67% 30°

LEWISTOWN, MT extended weather forecast

Wednesday
28 OCT 2026
Thursday
29 OCT 2026
Friday
30 OCT 2026
Saturday
31 OCT 2026
Sunday
1 NOV 2026
Low 30° Low 27° Low 32° Low 32° Low 26°
High 51° High 50° High 51° High 53° High 49°
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 <!--SEARCHED_TOWN_NAME--> weather forecast Day 8
Partly Cloudy
12% Rain/Snow
Partly Cloudy
9% Rain/Snow
Overcast
14% Rain
Overcast
15% Rain
Partly Cloudy
24% Rain/Snow
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