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

87°F

31°C

Humidity 35%
Wind Speed Calm
Barometer 30.24 in
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 22 Aug 2:55 pm MDT
Extended Forecast for

Longmont CO

  • This Afternoon

    This Afternoon: A 30 percent chance of showers and thunderstorms, mainly after 4pm. Mostly cloudy, with a high near 91. East northeast wind around 7 mph becoming west northwest.

    High: 91 °F

    Chance
    T-storms

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms, mainly before 8pm. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 62. West wind 5 to 8 mph becoming calm in the evening.

    Low: 62 °F

    Chance
    T-storms then
    Patchy Fog

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms, mainly after 4pm. Patchy fog before 9am. Otherwise, mostly sunny, with a high near 94. Calm wind becoming east northeast 5 to 7 mph in the afternoon.

    High: 94 °F

    Patchy Fog
    then Chance
    T-storms

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 63. South wind 5 to 7 mph becoming west northwest after midnight.

    Low: 63 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: A 40 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 92. Calm wind becoming north around 6 mph in the afternoon. Winds could gust as high as 16 mph.

    High: 92 °F

    Mostly Sunny
    then Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Mostly cloudy, with a low around 61. Chance of precipitation is 30%.

    Low: 61 °F

    Chance
    Showers then
    Partly Cloudy

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 89.

    High: 89 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 59.

    Low: 59 °F

    Chance
    Showers then
    Partly Cloudy

  • Wednesday

    Wednesday: A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 88.

    High: 88 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms, mainly after 4pm. Mostly cloudy, with a high near 91. East northeast wind around 7 mph becoming west northwest.
Tonight
A 40 percent chance of showers and thunderstorms, mainly before 8pm. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 62. West wind 5 to 8 mph becoming calm in the evening.
Sunday
A 30 percent chance of showers and thunderstorms, mainly after 4pm. Patchy fog before 9am. Otherwise, mostly sunny, with a high near 94. Calm wind becoming east northeast 5 to 7 mph in the afternoon.
Sunday Night
A 20 percent chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 63. South wind 5 to 7 mph becoming west northwest after midnight.
Monday
A 40 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 92. Calm wind becoming north around 6 mph in the afternoon. Winds could gust as high as 16 mph.
Monday Night
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Mostly cloudy, with a low around 61. Chance of precipitation is 30%.
Tuesday
A 40 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 89.
Tuesday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 59.
Wednesday
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 88.
Wednesday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 59.
Thursday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 91.
Thursday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 60.
Friday
Mostly sunny, with a high near 93.
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ABOUT THIS FORECAST

 
Point Forecast:
Longmont CO
 40.18°N 105.12°W (Elev. 5030 ft)
Last Update:
12:46 pm MDT Aug 22, 2026
Forecast Valid:
3pm MDT Aug 22, 2026-6pm MDT Aug 28, 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