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.

Fair

86°F

30°C

Humidity 27%
Wind Speed SE 5 mph
Barometer 30.03 in
Dewpoint 48°F (9°C)
Visibility 7.00 mi
Heat Index83°F (28°C)
Last update 12 Aug 11:15 am MDT
Extended Forecast for

Longmont CO

  • Today

    Today: A 50 percent chance of showers and thunderstorms after noon. Increasing clouds, with a high near 93. Light and variable wind becoming west 5 to 9 mph in the afternoon. Winds could gust as high as 15 mph.

    High: 93 °F

    Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 3am. Cloudy, then gradually becoming partly cloudy, with a low around 61. West wind 5 to 9 mph becoming light and variable in the evening. Winds could gust as high as 15 mph. Chance of precipitation is 50%.

    Low: 61 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Thursday

    Thursday: Showers and thunderstorms likely, mainly after 3pm. Increasing clouds, with a high near 82. Calm wind becoming south southeast around 6 mph in the afternoon. Chance of precipitation is 70%.

    High: 82 °F

    Mostly Sunny
    then T-storms
    Likely

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm before midnight, then a chance of showers. Low around 59. South wind around 6 mph becoming calm in the evening. Chance of precipitation is 80%.

    Low: 59 °F

    Showers then
    Chance
    Showers

  • Friday

    Friday: Showers and possibly a thunderstorm after noon. High near 83. Calm wind becoming west southwest around 6 mph in the afternoon. Chance of precipitation is 80%.

    High: 83 °F

    Partly Sunny
    then T-storms

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm before midnight. Mostly cloudy, with a low around 56. Chance of precipitation is 70%.

    Low: 56 °F

    Showers
    Likely then
    Mostly Cloudy

  • Saturday

    Saturday: 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

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm before midnight, then a slight chance of showers. Mostly cloudy, with a low around 55.

    Low: 55 °F

    Showers
    Likely

  • Sunday

    Sunday: Showers and thunderstorms likely after noon. Partly sunny, with a high near 81.

    High: 81 °F

    Partly Sunny
    then T-storms
    Likely

Detailed Forecast

Today
A 50 percent chance of showers and thunderstorms after noon. Increasing clouds, with a high near 93. Light and variable wind becoming west 5 to 9 mph in the afternoon. Winds could gust as high as 15 mph.
Tonight
A chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 3am. Cloudy, then gradually becoming partly cloudy, with a low around 61. West wind 5 to 9 mph becoming light and variable in the evening. Winds could gust as high as 15 mph. Chance of precipitation is 50%.
Thursday
Showers and thunderstorms likely, mainly after 3pm. Increasing clouds, with a high near 82. Calm wind becoming south southeast around 6 mph in the afternoon. Chance of precipitation is 70%.
Thursday Night
Showers and possibly a thunderstorm before midnight, then a chance of showers. Low around 59. South wind around 6 mph becoming calm in the evening. Chance of precipitation is 80%.
Friday
Showers and possibly a thunderstorm after noon. High near 83. Calm wind becoming west southwest around 6 mph in the afternoon. Chance of precipitation is 80%.
Friday Night
Showers likely and possibly a thunderstorm before midnight. Mostly cloudy, with a low around 56. Chance of precipitation is 70%.
Saturday
Showers and thunderstorms likely after noon. Partly sunny, with a high near 81. Chance of precipitation is 60%.
Saturday Night
Showers likely and possibly a thunderstorm before midnight, then a slight chance of showers. Mostly cloudy, with a low around 55.
Sunday
Showers and thunderstorms likely after noon. Partly sunny, with a high near 81.
Sunday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 56.
Monday
A chance of showers and thunderstorms. Mostly sunny, with a high near 85.
Monday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 57.
Tuesday
A slight 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:
12:46 am MDT Aug 12, 2026
Forecast Valid:
11am MDT Aug 12, 2026-6pm MDT Aug 18, 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