LEWISTOWN, MT 59457 Weather Forecast & Current Conditions

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59457 WEATHER WARNINGS (SEVERE T-STORM & TORNADO)

CURRENT WEATHER
LEWISTOWN, MT Current Weather
2:54 PM MST FEB 18, 2026
Overcast 0°F
Feels Like:	-19°F
Dewpoint:	-8°F
Rel. Hum.:	65%
Visibility:	10 miles
Wind:	WNW at 14 mph
Pressure:	29.71 inches
Last 72 hours
Local Area Snow Depth
Montana Current Weather
Montana MOS Forecast Weather

Regional Weather Maps

(Automated weather data from NWS/FAA)

59457 WEATHER FORECAST
10-Day model forecast maps 2025 Hurricanes	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.

59457 WEATHER SATELLITE LOOPS

Visible Weather Satellite
LEWISTOWN, MT 59457

Infrared Weather Satellite
LEWISTOWN, MT 59457

59457 WEATHER RADAR LOOP

NEXRAD Weather Radar
LEWISTOWN, MT 59457

MOS COMPUTER WEATHER FORECAST

LEWISTOWN, MT 3 hourly weather forecast

weather forecast created 4:00 AM PST 2/18/2026

DAY/DATE &
WEATHER FORECAST SUMMARY

Wednesday
18 FEB 2026

11 AM

2°

-14°

Mostly Cloudy

36%
SNOW
<.1 in

0% Thunder
( 0% severe)

NW 10

55%

-9°

High 6°

2 PM

5°

-11°

Mostly Cloudy

NW 12

49%

-8°

Mostly Cloudy

Snow Likely

5 PM

2°

-15°

Mostly Cloudy

66%
SNOW
>20 in

0% Thunder
( 2% severe)

NW 12

58%

-8°

8 PM

-1°

-17°

Mostly Cloudy

NW 9

72%

-7°

Thursday
19 FEB 2026

11 PM

-2°

-17°

Mostly Cloudy

50%
SNOW
2.5–5 in

0% Thunder
( 0% severe)

NW 8

76%

-7°

Low -6°

2 AM

-2°

-14°

Mostly Cloudy

WNW 6

72%

-8°

High 14°

5 AM

-3°

-13°

Mostly Cloudy

28%
SNOW
.1–1 in

0% Thunder
( 0% severe)

WNW 5

76%

-8°

Mostly Cloudy

Chance of Snow

8 AM

-3°

-10°

Mostly Cloudy

NW 2

76%

-8°

11 AM

4°

-2°

Mostly Cloudy

12%
SNOW
<.1 in

0% Thunder
( 0% severe)

NNW 1

61%

-5°

2 PM

11°

6°

Mostly Cloudy

N 1

56%

0°

5 PM

11°

6°

Partly Cloudy

7%

0% Thunder
( 0% severe)

N 2

59%

1°

8 PM

3°

-4°

Partly Cloudy

SE 3

81%

-1°

Friday
20 FEB 2026

11 PM

1°

-7°

Partly Cloudy

1%

0% Thunder
( 0% severe)

SE 3

85%

-2°

Low -1°

2 AM

2°

-6°

Partly Cloudy

SSE 3

76%

-3°

High 28°

5 AM

3°

-4°

Partly Cloudy

1%

0% Thunder
( 0% severe)

SSE 3

76%

-2°

Partly Cloudy

8 AM

5°

-1°

Partly Cloudy

S 2

72%

-1°

11 AM

21°

17°

Partly Cloudy

12%
SNOW
<.1 in

0% Thunder
( 1% severe)

W 2

50%

7°

2 PM

26°

22°

Mostly Cloudy

NW 3

44%

9°

5 PM

23°

18°

Mostly Cloudy

N 3

56%

11°


LEWISTOWN, MT extended weather forecast
Saturday 21 FEB 2026	Sunday 22 FEB 2026	Monday 23 FEB 2026	Tuesday 24 FEB 2026	Wednesday 25 FEB 2026
Low 7°	Low -2°	Low 11°	Low 15°	Low 18°
High 22°	High 26°	High 32°	High 32°	High 34°

Overcast 18% Snow	Mostly Cloudy 15% Snow	Overcast 19% Snow/Ice	Overcast 45% Snow	Overcast 26% Snow

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