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

91°F

33°C

Humidity 20%
Wind Speed E 7 mph
Barometer 30.00 in
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 13 Sep 1:35 pm MDT
Extended Forecast for

Longmont CO

  • This Afternoon

    This Afternoon: A slight chance of showers, then a chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 92. Southeast wind around 7 mph. Chance of precipitation is 30%.

    High: 92 °F

    Chance
    Showers

  • Tonight

    Tonight: A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and midnight. Increasing clouds, with a low around 62. West wind 5 to 7 mph becoming light and variable after midnight. Chance of precipitation is 30%.

    Low: 62 °F

    Chance
    Showers then
    Mostly Cloudy

  • Monday

    Monday: A slight chance of showers, with thunderstorms also possible after 3pm. Partly sunny, with a high near 88. Light west southwest wind becoming west 6 to 11 mph in the morning. Winds could gust as high as 18 mph. Chance of precipitation is 20%.

    High: 88 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Monday Night

    Monday Night: A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 52. West wind 6 to 10 mph becoming north after midnight. Winds could gust as high as 16 mph.

    Low: 52 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: A 20 percent chance of showers after noon. Partly sunny, with a high near 73. Light and variable wind becoming southeast 5 to 7 mph in the morning.

    High: 73 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers before midnight. Mostly cloudy, with a low around 51.

    Low: 51 °F

    Chance
    Showers then
    Partly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Wednesday Night

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

    Low: 57 °F

    Chance
    Showers then
    Mostly Cloudy

  • Thursday

    Thursday: A chance of showers and thunderstorms after noon. Partly sunny, with a high near 78.

    High: 78 °F

    Partly Sunny
    then Chance
    T-storms

Detailed Forecast

This Afternoon
A slight chance of showers, then a chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 92. Southeast wind around 7 mph. Chance of precipitation is 30%.
Tonight
A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and midnight. Increasing clouds, with a low around 62. West wind 5 to 7 mph becoming light and variable after midnight. Chance of precipitation is 30%.
Monday
A slight chance of showers, with thunderstorms also possible after 3pm. Partly sunny, with a high near 88. Light west southwest wind becoming west 6 to 11 mph in the morning. Winds could gust as high as 18 mph. Chance of precipitation is 20%.
Monday Night
A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 52. West wind 6 to 10 mph becoming north after midnight. Winds could gust as high as 16 mph.
Tuesday
A 20 percent chance of showers after noon. Partly sunny, with a high near 73. Light and variable wind becoming southeast 5 to 7 mph in the morning.
Tuesday Night
A 30 percent chance of showers before midnight. Mostly cloudy, with a low around 51.
Wednesday
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 83.
Wednesday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 57.
Thursday
A chance of showers and thunderstorms after noon. Partly sunny, with a high near 78.
Thursday Night
Showers likely and possibly a thunderstorm before midnight, then a slight chance of showers. Mostly cloudy, with a low around 55.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 80.
Friday Night
A chance of showers. Mostly cloudy, with a low around 51.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 77.
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ABOUT THIS FORECAST

 
Point Forecast:
Longmont CO
 40.16°N 105.12°W (Elev. 5000 ft)
Last Update:
12:46 pm MDT Sep 13, 2026
Forecast Valid:
2pm MDT Sep 13, 2026-6pm MDT Sep 19, 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