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

67°F

19°C

Humidity 47%
Wind Speed Calm
Barometer 30.17 in
Dewpoint 46°F (8°C)
Visibility 7.00 mi
Last update 18 Aug 12:55 am MDT
Extended Forecast for

Longmont CO

  • Overnight

    Overnight: Mostly clear, with a low around 60. North northwest wind around 6 mph.

    Low: 60 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms, mainly after 3pm. Partly sunny, with a high near 91. Calm wind becoming northeast 5 to 9 mph in the afternoon. Winds could gust as high as 17 mph.

    High: 91 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 3am. Mostly cloudy, then gradually becoming mostly clear, with a low around 60. Northeast wind 5 to 7 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 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 88. Calm wind becoming north northeast 5 to 7 mph in the afternoon.

    High: 88 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 59. East southeast wind 5 to 7 mph becoming calm after midnight.

    Low: 59 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 94.

    High: 94 °F

    Sunny

  • Thursday Night

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

    Low: 61 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 95.

    High: 95 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 63.

    Low: 63 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 60. North northwest wind around 6 mph.
Tuesday
A 30 percent chance of showers and thunderstorms, mainly after 3pm. Partly sunny, with a high near 91. Calm wind becoming northeast 5 to 9 mph in the afternoon. Winds could gust as high as 17 mph.
Tuesday Night
A chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 3am. Mostly cloudy, then gradually becoming mostly clear, with a low around 60. Northeast wind 5 to 7 mph becoming calm in the evening. Winds could gust as high as 15 mph. Chance of precipitation is 40%.
Wednesday
A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 88. Calm wind becoming north northeast 5 to 7 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 59. East southeast wind 5 to 7 mph becoming calm after midnight.
Thursday
Sunny, with a high near 94.
Thursday Night
Partly cloudy, with a low around 61.
Friday
Mostly sunny, with a high near 95.
Friday Night
Partly cloudy, with a low around 63.
Saturday
A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 93.
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 93.
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 91.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Longmont CO
 40.16°N 105.12°W (Elev. 5000 ft)
Last Update:
12:46 am MDT Aug 18, 2026
Forecast Valid:
1am MDT Aug 18, 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