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

81°F

27°C

Humidity 21%
Wind Speed Calm
Barometer 30.32 in
Dewpoint 38°F (3°C)
Visibility 7.00 mi
Heat Index79°F (26°C)
Last update 31 Aug 12:35 pm MDT
Extended Forecast for

Longmont CO

  • This Afternoon

    This Afternoon: Sunny, with a high near 81. Northeast wind 3 to 6 mph.

    High: 81 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 53. Northeast wind around 6 mph becoming calm in the evening.

    Low: 53 °F

    Mostly Clear

  • Labor Day

    Labor Day: Sunny, with a high near 83. Calm wind becoming northeast around 6 mph in the afternoon. Winds could gust as high as 15 mph.

    High: 83 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 53. East northeast wind around 6 mph becoming calm in the evening.

    Low: 53 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 84. Calm wind becoming east northeast around 6 mph in the afternoon.

    High: 84 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 54.

    Low: 54 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 53.

    Low: 53 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 81. Northeast wind 3 to 6 mph.
Tonight
Mostly clear, with a low around 53. Northeast wind around 6 mph becoming calm in the evening.
Labor Day
Sunny, with a high near 83. Calm wind becoming northeast around 6 mph in the afternoon. Winds could gust as high as 15 mph.
Monday Night
Mostly clear, with a low around 53. East northeast wind around 6 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 84. Calm wind becoming east northeast around 6 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 54.
Wednesday
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 82.
Wednesday Night
Partly cloudy, with a low around 53.
Thursday
Mostly sunny, with a high near 83.
Thursday Night
Mostly clear, with a low around 53.
Friday
Sunny, with a high near 82.
Friday Night
Partly cloudy, with a low around 52.
Saturday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 84.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Longmont CO
 40.16°N 105.09°W (Elev. 4980 ft)
Last Update:
4:01 am MDT Aug 31, 2025
Forecast Valid:
12pm MDT Aug 31, 2025-6pm MDT Sep 6, 2025
 
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