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

62°F

17°C

Humidity 60%
Wind Speed W 3 mph
Barometer 30.24 in
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 21 Aug 4:15 am MDT
Extended Forecast for

Longmont CO

  • Today

    Today: A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny and hot, with a high near 98. Calm wind becoming north northwest 5 to 9 mph in the afternoon. Winds could gust as high as 16 mph.

    High: 98 °F

    Sunny then
    Slight Chance
    T-storms

  • Tonight

    Tonight: Partly cloudy, with a low around 63. West northwest wind 3 to 8 mph.

    Low: 63 °F

    Partly Cloudy

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms, mainly after 3pm. Mostly sunny, with a high near 92. Light and variable wind becoming south southwest 5 to 10 mph in the morning. Winds could gust as high as 17 mph.

    High: 92 °F

    Mostly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A 50 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 62. East southeast wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 17 mph.

    Low: 62 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Sunday

    Sunday: A 50 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 92. Calm wind becoming east southeast 5 to 9 mph in the afternoon. Winds could gust as high as 15 mph.

    High: 92 °F

    Mostly Sunny
    then Chance
    T-storms

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Partly cloudy, with a low around 62. Chance of precipitation is 20%.

    Low: 62 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 92.

    High: 92 °F

    Mostly Sunny
    then Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 60.

    Low: 60 °F

    Chance
    Showers then
    Mostly Cloudy

  • Tuesday

    Tuesday: A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 89.

    High: 89 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny and hot, with a high near 98. Calm wind becoming north northwest 5 to 9 mph in the afternoon. Winds could gust as high as 16 mph.
Tonight
Partly cloudy, with a low around 63. West northwest wind 3 to 8 mph.
Saturday
A 40 percent chance of showers and thunderstorms, mainly after 3pm. Mostly sunny, with a high near 92. Light and variable wind becoming south southwest 5 to 10 mph in the morning. Winds could gust as high as 17 mph.
Saturday Night
A 50 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 62. East southeast wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 17 mph.
Sunday
A 50 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 92. Calm wind becoming east southeast 5 to 9 mph in the afternoon. Winds could gust as high as 15 mph.
Sunday Night
A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Partly cloudy, with a low around 62. Chance of precipitation is 20%.
Monday
A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 92.
Monday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 60.
Tuesday
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 89.
Tuesday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 58.
Wednesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 88.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 58.
Thursday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 91.
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ABOUT THIS FORECAST

 
Point Forecast:
Longmont CO
 40.16°N 105.09°W (Elev. 4980 ft)
Last Update:
12:46 am MDT Aug 21, 2026
Forecast Valid:
4am MDT Aug 21, 2026-6pm MDT Aug 27, 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