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

Hazardous Weather Conditions

Current conditions at

Vance Brand Airport (KLMO)

Lat: 40.16°NLon: 105.16°WElev: 5039ft.

Fair

22°F

-6°C

Humidity 49%
Wind Speed Calm
Barometer 30.09 in
Dewpoint 6°F (-14°C)
Visibility 10.00 mi
Last update 17 Jan 9:15 pm MST
Extended Forecast for

Longmont CO

  • Tonight

    Tonight: Mostly clear, with a temperature falling to near 24 by 11pm, then rising to around 28 during the remainder of the night. West wind 7 to 9 mph, with gusts as high as 15 mph.

    Low: 24 °F⇑

    Mostly Clear

  • Sunday

    Sunday: Increasing clouds, with a high near 54. West southwest wind 5 to 8 mph becoming east northeast in the afternoon.

    High: 54 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: A 50 percent chance of snow, mainly after 11pm. Mostly cloudy, with a low around 20. East wind 5 to 7 mph becoming calm in the evening. Winds could gust as high as 15 mph. New snow accumulation of less than one inch possible.

    Low: 20 °F

    Chance Snow

  • M.L.King Day

    M.L.King Day: A 40 percent chance of snow before 11am. Mostly cloudy, then gradually becoming sunny, with a high near 39. Light south southeast wind. Little or no snow accumulation expected.

    High: 39 °F

    Chance Snow
    then Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 19. West southwest wind 5 to 7 mph, with gusts as high as 16 mph.

    Low: 19 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 56.

    High: 56 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 21.

    Low: 21 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 45.

    High: 45 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 17.

    Low: 17 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a temperature falling to near 24 by 11pm, then rising to around 28 during the remainder of the night. West wind 7 to 9 mph, with gusts as high as 15 mph.
Sunday
Increasing clouds, with a high near 54. West southwest wind 5 to 8 mph becoming east northeast in the afternoon.
Sunday Night
A 50 percent chance of snow, mainly after 11pm. Mostly cloudy, with a low around 20. East wind 5 to 7 mph becoming calm in the evening. Winds could gust as high as 15 mph. New snow accumulation of less than one inch possible.
M.L.King Day
A 40 percent chance of snow before 11am. Mostly cloudy, then gradually becoming sunny, with a high near 39. Light south southeast wind. Little or no snow accumulation expected.
Monday Night
Mostly clear, with a low around 19. West southwest wind 5 to 7 mph, with gusts as high as 16 mph.
Tuesday
Sunny, with a high near 56.
Tuesday Night
Mostly clear, with a low around 21.
Wednesday
Mostly sunny, with a high near 45.
Wednesday Night
Partly cloudy, with a low around 17.
Thursday
Mostly sunny, with a high near 51.
Thursday Night
Partly cloudy, with a low around 22.
Friday
Mostly sunny, with a high near 48.
Friday Night
Partly cloudy, with a low around 18.
Saturday
Mostly sunny, with a high near 45.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Longmont CO
 40.16°N 105.09°W (Elev. 4980 ft)
Last Update:
2:16 pm MST Jan 17, 2026
Forecast Valid:
9pm MST Jan 17, 2026-6pm MST Jan 24, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation