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

65°F

18°C

Humidity 47%
Wind Speed NW 7 mph
Barometer 30.09 in
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 1 Sep 11:55 pm MDT
Extended Forecast for

Longmont CO

  • Overnight

    Overnight: Partly cloudy, with a low around 59. Light west northwest wind.

    Low: 59 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 90. Calm wind becoming south southeast 5 to 8 mph in the afternoon.

    High: 90 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 58. South wind around 6 mph becoming light and variable in the evening.

    Low: 58 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 91. Calm wind becoming southeast 5 to 8 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 91 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 59. South southeast wind around 5 mph becoming light and variable after midnight.

    Low: 59 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 93.

    High: 93 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 62.

    Low: 62 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 93.

    High: 93 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 63.

    Low: 63 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 59. Light west northwest wind.
Wednesday
Mostly sunny, with a high near 90. Calm wind becoming south southeast 5 to 8 mph in the afternoon.
Wednesday Night
A 20 percent chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 58. South wind around 6 mph becoming light and variable in the evening.
Thursday
Sunny, with a high near 91. Calm wind becoming southeast 5 to 8 mph in the afternoon. Winds could gust as high as 18 mph.
Thursday Night
Mostly clear, with a low around 59. South southeast wind around 5 mph becoming light and variable after midnight.
Friday
Sunny, with a high near 93.
Friday Night
Partly cloudy, with a low around 62.
Saturday
Mostly sunny, with a high near 93.
Saturday Night
A slight chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 63.
Sunday
A chance of showers and thunderstorms after noon. Partly sunny, with a high near 89.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 60.
Labor Day
A chance of showers and thunderstorms. Partly sunny, with a high near 89.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 60.
Tuesday
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 Sep 1, 2026
Forecast Valid:
12am MDT Sep 2, 2026-6pm MDT Sep 8, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation