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.

Partly Cloudy with Haze

69°F

21°C

Humidity 77%
Wind Speed N 3 mph
Barometer 30.06 in
Dewpoint 62°F (17°C)
Visibility 5.00 mi
Last update 13 Aug 9:15 pm MDT
Extended Forecast for

Longmont CO

  • Tonight

    Tonight: A chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 3am. Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 59. Light and variable wind. Chance of precipitation is 30%.

    Low: 59 °F

    Chance
    Showers and
    Patchy Fog

  • Friday

    Friday: Showers and thunderstorms likely, mainly after 3pm. Patchy fog before 9am. Otherwise, partly sunny, with a high near 84. Calm wind becoming west southwest 5 to 8 mph in the afternoon. Chance of precipitation is 60%.

    High: 84 °F

    Patchy Fog
    then T-storms
    Likely

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm before 9pm, then a chance of showers and thunderstorms between 9pm and midnight. Mostly cloudy, with a low around 58. West southwest wind 5 to 8 mph becoming calm in the evening. Chance of precipitation is 60%.

    Low: 58 °F

    Showers
    Likely then
    Mostly Cloudy

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm between noon and 3pm, then showers and thunderstorms likely after 3pm. Partly sunny, with a high near 82. Calm wind becoming northeast around 5 mph in the afternoon. Chance of precipitation is 70%.

    High: 82 °F

    Mostly Sunny
    then T-storms
    Likely

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Partly cloudy, with a low around 56. North wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%.

    Low: 56 °F

    Chance
    T-storms then
    Partly Cloudy

  • Sunday

    Sunday: Showers and thunderstorms likely after noon. Partly sunny, with a high near 81. Chance of precipitation is 60%.

    High: 81 °F

    Mostly Sunny
    then T-storms
    Likely

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 55.

    Low: 55 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

Detailed Forecast

Tonight
A chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 3am. Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 59. Light and variable wind. Chance of precipitation is 30%.
Friday
Showers and thunderstorms likely, mainly after 3pm. Patchy fog before 9am. Otherwise, partly sunny, with a high near 84. Calm wind becoming west southwest 5 to 8 mph in the afternoon. Chance of precipitation is 60%.
Friday Night
Showers likely and possibly a thunderstorm before 9pm, then a chance of showers and thunderstorms between 9pm and midnight. Mostly cloudy, with a low around 58. West southwest wind 5 to 8 mph becoming calm in the evening. Chance of precipitation is 60%.
Saturday
Showers likely and possibly a thunderstorm between noon and 3pm, then showers and thunderstorms likely after 3pm. Partly sunny, with a high near 82. Calm wind becoming northeast around 5 mph in the afternoon. Chance of precipitation is 70%.
Saturday Night
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Partly cloudy, with a low around 56. North wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%.
Sunday
Showers and thunderstorms likely after noon. Partly sunny, with a high near 81. Chance of precipitation is 60%.
Sunday Night
A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 55.
Monday
Mostly sunny, with a high near 85.
Monday Night
Mostly clear, with a low around 56.
Tuesday
Mostly sunny, with a high near 89.
Tuesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 57.
Wednesday
A chance of showers and thunderstorms. Partly sunny, with a high near 87.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 57.
Thursday
A chance of showers and thunderstorms. Mostly sunny, with a high near 88.
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ABOUT THIS FORECAST

 
Point Forecast:
Longmont CO
 40.16°N 105.09°W (Elev. 4980 ft)
Last Update:
12:47 pm MDT Aug 13, 2026
Forecast Valid:
9pm MDT Aug 13, 2026-6pm MDT Aug 20, 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