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

Vance Brand Airport (KLMO)

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

Mostly Cloudy

82°F

28°C

Humidity 26%
Wind Speed NW 10 mph
Barometer 29.92 in
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 14 Sep 5:15 pm MDT
Extended Forecast for

Longmont CO

  • This Afternoon

    This Afternoon: A 20 percent chance of showers. Partly sunny, with a high near 88. West southwest wind around 13 mph, with gusts as high as 21 mph.

    High: 88 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: A 20 percent chance of showers. Partly cloudy, with a low around 53. West wind 7 to 11 mph becoming north after midnight. Winds could gust as high as 18 mph.

    Low: 53 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers between noon and 3pm, then a chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 76. Light and variable wind becoming southeast 5 to 8 mph in the morning. Chance of precipitation is 30%.

    High: 76 °F

    Mostly Sunny
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 53. East southeast wind 5 to 9 mph becoming north northwest after midnight. Winds could gust as high as 15 mph.

    Low: 53 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers between noon and 3pm, then a slight chance of showers and thunderstorms after 3pm. Partly sunny, with a high near 82. Calm wind becoming east southeast around 5 mph in the afternoon. Chance of precipitation is 20%.

    High: 82 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Mostly cloudy, with a low around 60. Chance of precipitation is 30%.

    Low: 60 °F

    Chance
    Showers then
    Mostly Cloudy

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 77.

    High: 77 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before midnight, then a slight chance of showers. Mostly cloudy, with a low around 57.

    Low: 57 °F

    Chance
    Showers

  • Friday

    Friday: Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 83.

    High: 83 °F

    Partly Sunny
    then Showers
    Likely

Detailed Forecast

This Afternoon
A 20 percent chance of showers. Partly sunny, with a high near 88. West southwest wind around 13 mph, with gusts as high as 21 mph.
Tonight
A 20 percent chance of showers. Partly cloudy, with a low around 53. West wind 7 to 11 mph becoming north after midnight. Winds could gust as high as 18 mph.
Tuesday
A chance of showers between noon and 3pm, then a chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 76. Light and variable wind becoming southeast 5 to 8 mph in the morning. Chance of precipitation is 30%.
Tuesday Night
Mostly cloudy, with a low around 53. East southeast wind 5 to 9 mph becoming north northwest after midnight. Winds could gust as high as 15 mph.
Wednesday
A slight chance of showers between noon and 3pm, then a slight chance of showers and thunderstorms after 3pm. Partly sunny, with a high near 82. Calm wind becoming east southeast around 5 mph in the afternoon. Chance of precipitation is 20%.
Wednesday Night
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Mostly cloudy, with a low around 60. Chance of precipitation is 30%.
Thursday
A 40 percent chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 77.
Thursday Night
A chance of showers and thunderstorms before midnight, then a slight chance of showers. Mostly cloudy, with a low around 57.
Friday
Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 83.
Friday Night
A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 54.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 77.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 51.
Sunday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 76.
Sunday Night
A chance of showers. Partly cloudy, with a low around 51.
Monday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 77.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Longmont CO
 40.19°N 105.09°W (Elev. 5010 ft)
Last Update:
12:46 pm MDT Sep 14, 2026
Forecast Valid:
5pm MDT Sep 14, 2026-6pm MDT Sep 21, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation