National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Frigid Airmass to Bring Significantly Colder Temperatures; Snow Continues Downwind of the Great Lakes

A frigid cold airmass will bring significantly colder weather across the eastern two thirds of the country early this week. Record low temperatures are expected in the Southeast by Tuesday morning. Moderate to heavy lake effect snow will continue downwind of the Great Lakes through Monday. Several inches of snow accumulation is expected, including in portions of the Chicago Metro Read More >

Current conditions at

Lewistown, Lewistown Municipal Airport (KLWT)

Lat: 47.04917°NLon: 109.46639°WElev: 4167.0ft.

Clear

48°F

9°C

Humidity 42%
Wind Speed WSW 5 MPH
Barometer 30.17 in (1021.67 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill46°F (8°C)
Last update 10 Nov 01:20 AM MST
Extended Forecast for

Lewistown MTSimilar City Names

  • Overnight

    Overnight: Mostly cloudy, with a low around 35. South southwest wind 8 to 10 mph.

    Low: 35 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 65. West southwest wind 10 to 14 mph, with gusts as high as 23 mph.

    High: 65 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 38. West wind around 15 mph, with gusts as high as 25 mph.

    Low: 38 °F

    Decreasing
    Clouds

  • Veterans Day

    Veterans Day: Sunny, with a high near 57. West northwest wind 13 to 18 mph, with gusts as high as 26 mph.

    High: 57 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 31. West northwest wind 5 to 9 mph becoming light and variable in the evening.

    Low: 31 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 59. South wind around 6 mph becoming west southwest in the afternoon.

    High: 59 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 38. South wind 5 to 7 mph.

    Low: 38 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 65. South wind 8 to 11 mph, with gusts as high as 21 mph.

    High: 65 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A slight chance of rain after 11pm, mixing with snow after 2am. Mostly cloudy, with a low around 35.

    Low: 35 °F

    Slight Chance
    Rain then
    Slight Chance
    Rain/Snow

Detailed Forecast

Overnight
Mostly cloudy, with a low around 35. South southwest wind 8 to 10 mph.
Monday
Mostly cloudy, with a high near 65. West southwest wind 10 to 14 mph, with gusts as high as 23 mph.
Monday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 38. West wind around 15 mph, with gusts as high as 25 mph.
Veterans Day
Sunny, with a high near 57. West northwest wind 13 to 18 mph, with gusts as high as 26 mph.
Tuesday Night
Partly cloudy, with a low around 31. West northwest wind 5 to 9 mph becoming light and variable in the evening.
Wednesday
Mostly cloudy, with a high near 59. South wind around 6 mph becoming west southwest in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 38. South wind 5 to 7 mph.
Thursday
Mostly sunny, with a high near 65. South wind 8 to 11 mph, with gusts as high as 21 mph.
Thursday Night
A slight chance of rain after 11pm, mixing with snow after 2am. Mostly cloudy, with a low around 35.
Friday
A chance of rain and snow, mainly before 11am. Mostly cloudy, with a high near 48.
Friday Night
A slight chance of rain and snow. Mostly cloudy, with a low around 26.
Saturday
Mostly sunny, with a high near 46.
Saturday Night
Partly cloudy, with a low around 26.
Sunday
A slight chance of rain and snow. Partly sunny, with a high near 48.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lewistown MTSimilar City Names
 47.07°N 109.43°W (Elev. 3898 ft)
Last Update:
7:00 pm MST Nov 9, 2025
Forecast Valid:
1am MST Nov 10, 2025-6pm MST Nov 16, 2025
 
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