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

89°F

32°C

Humidity 19%
Wind Speed NE 3 mph
Barometer 30.19 in
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 17 Aug 3:35 pm MDT
Extended Forecast for

Longmont CO

  • Tonight

    Tonight: Partly cloudy, with a low around 60. East wind around 6 mph becoming light and variable after midnight.

    Low: 60 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 90. Light and variable wind becoming northeast 5 to 10 mph in the afternoon. Winds could gust as high as 16 mph.

    High: 90 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 60. Northeast wind 5 to 9 mph becoming calm in the evening. Winds could gust as high as 15 mph. Chance of precipitation is 40%.

    Low: 60 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 87. Calm wind becoming northeast around 6 mph in the afternoon. Winds could gust as high as 15 mph.

    High: 87 °F

    Mostly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Partly cloudy, with a low around 59. South southeast wind around 6 mph becoming calm in the evening. Winds could gust as high as 15 mph. Chance of precipitation is 20%.

    Low: 59 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy

  • Friday

    Friday: A slight chance of showers and thunderstorms after noon. Sunny, with a high near 93.

    High: 93 °F

    Sunny then
    Slight Chance
    T-storms

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 62.

    Low: 62 °F

    Slight Chance
    T-storms then
    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 60. East wind around 6 mph becoming light and variable after midnight.
Tuesday
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 90. Light and variable wind becoming northeast 5 to 10 mph in the afternoon. Winds could gust as high as 16 mph.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 60. Northeast wind 5 to 9 mph becoming calm in the evening. Winds could gust as high as 15 mph. Chance of precipitation is 40%.
Wednesday
A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 87. Calm wind becoming northeast around 6 mph in the afternoon. Winds could gust as high as 15 mph.
Wednesday Night
A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Partly cloudy, with a low around 59. South southeast wind around 6 mph becoming calm in the evening. Winds could gust as high as 15 mph. Chance of precipitation is 20%.
Thursday
Sunny, with a high near 89.
Thursday Night
Partly cloudy, with a low around 61.
Friday
A slight chance of showers and thunderstorms after noon. Sunny, with a high near 93.
Friday Night
A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 62.
Saturday
A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 92.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 63.
Sunday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 91.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 61.
Monday
A chance of showers and thunderstorms. Partly sunny, with a high near 89.
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ABOUT THIS FORECAST

 
Point Forecast:
Longmont CO
 40.19°N 105.09°W (Elev. 5010 ft)
Last Update:
12:46 pm MDT Aug 17, 2026
Forecast Valid:
4pm MDT Aug 17, 2026-6pm MDT Aug 24, 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