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

18°C

65°F

Humidity 22%
Wind Speed NW 15 km/h
Barometer 29.89 in
Dewpoint -4°C (25°F)
Visibility 16 km
Last update 21 Apr 8:35 pm MDT
Extended Forecast for

Longmont CO

Fire Weather Watch April 23, 10:00am until April 23, 08:00pm
Red Flag Warning April 22, 10:00am until April 23, 12:00am
Click here for hazard details and duration
Fire Weather Watch
Red Flag Warning

  • Tonight

    Tonight: Mostly cloudy, with a low around 10. West southwest wind 8 to 10 km/h.

    Low: 10 °C

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 29. Breezy, with a south wind 10 to 15 km/h increasing to 24 to 29 km/h in the afternoon. Winds could gust as high as 48 km/h.

    High: 29 °C

    Mostly Sunny
    then Sunny
    and Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 6. Breezy, with a west wind 27 to 32 km/h decreasing to 16 to 21 km/h in the evening. Winds could gust as high as 50 km/h.

    Low: 6 °C

    Partly Cloudy
    and Breezy
    then Mostly
    Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 19. Breezy, with a west wind 18 to 23 km/h increasing to 27 to 32 km/h in the afternoon. Winds could gust as high as 50 km/h.

    High: 19 °C

    Mostly Sunny
    and Breezy

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 3. Breezy, with a west northwest wind 22 to 27 km/h becoming light west southwest after midnight. Winds could gust as high as 47 km/h.

    Low: 3 °C

    Partly Cloudy
    and Breezy
    then Partly
    Cloudy

  • Friday

    Friday: A 30 percent chance of showers after noon. Mostly sunny, with a high near 20.

    High: 20 °C

    Sunny then
    Chance
    Showers

  • Friday Night

    Friday Night: A 20 percent chance of showers before midnight. Partly cloudy, with a low around 1. Breezy.

    Low: 1 °C

    Slight Chance
    Showers and
    Breezy then
    Partly Cloudy

  • Saturday

    Saturday: A chance of showers and thunderstorms after noon. Partly sunny, with a high near 18.

    High: 18 °C

    Partly Sunny
    then Chance
    Showers

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm before midnight, then a chance of showers. Mostly cloudy, with a low around 4.

    Low: 4 °C

    Showers
    Likely

Detailed Forecast

Tonight
Mostly cloudy, with a low around 10. West southwest wind 8 to 10 km/h.
Wednesday
Mostly sunny, with a high near 29. Breezy, with a south wind 10 to 15 km/h increasing to 24 to 29 km/h in the afternoon. Winds could gust as high as 48 km/h.
Wednesday Night
Partly cloudy, with a low around 6. Breezy, with a west wind 27 to 32 km/h decreasing to 16 to 21 km/h in the evening. Winds could gust as high as 50 km/h.
Thursday
Mostly sunny, with a high near 19. Breezy, with a west wind 18 to 23 km/h increasing to 27 to 32 km/h in the afternoon. Winds could gust as high as 50 km/h.
Thursday Night
Partly cloudy, with a low around 3. Breezy, with a west northwest wind 22 to 27 km/h becoming light west southwest after midnight. Winds could gust as high as 47 km/h.
Friday
A 30 percent chance of showers after noon. Mostly sunny, with a high near 20.
Friday Night
A 20 percent chance of showers before midnight. Partly cloudy, with a low around 1. Breezy.
Saturday
A chance of showers and thunderstorms after noon. Partly sunny, with a high near 18.
Saturday Night
Showers likely and possibly a thunderstorm before midnight, then a chance of showers. Mostly cloudy, with a low around 4.
Sunday
A chance of showers, then showers and possibly a thunderstorm after noon. Mostly cloudy, with a high near 16.
Sunday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 2.
Monday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 17.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 3.
Tuesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 21.
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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 m)
Last Update:
12:46 pm MDT Apr 21, 2026
Forecast Valid:
8pm MDT Apr 21, 2026-6pm MDT Apr 28, 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