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

76°F

24°C

Humidity 22%
Wind Speed SE 7 mph
Barometer 30.23 in
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Heat Index77°F (25°C)
Last update 12 May 4:15 pm MDT
Extended Forecast for

Longmont CO

  • Tonight

    Tonight: Mostly clear, with a low around 50. East wind 5 to 7 mph becoming calm in the evening.

    Low: 50 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 3pm. Sunny, with a high near 89. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 89 °F

    Sunny then
    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 57. South wind 5 to 8 mph becoming west after midnight.

    Low: 57 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 88. Breezy, with a light and variable wind becoming west northwest 10 to 15 mph in the morning. Winds could gust as high as 29 mph.

    High: 88 °F

    Partly Sunny
    then Sunny
    and Breezy

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 50. West wind 5 to 13 mph, with gusts as high as 26 mph.

    Low: 50 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 52.

    Low: 52 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 51.

    Low: 51 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 50. East wind 5 to 7 mph becoming calm in the evening.
Wednesday
A 20 percent chance of showers and thunderstorms after 3pm. Sunny, with a high near 89. Calm wind becoming south 5 to 7 mph in the afternoon.
Wednesday Night
Increasing clouds, with a low around 57. South wind 5 to 8 mph becoming west after midnight.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 88. Breezy, with a light and variable wind becoming west northwest 10 to 15 mph in the morning. Winds could gust as high as 29 mph.
Thursday Night
Mostly clear, with a low around 50. West wind 5 to 13 mph, with gusts as high as 26 mph.
Friday
Sunny, with a high near 86.
Friday Night
Partly cloudy, with a low around 52.
Saturday
Mostly sunny, with a high near 86.
Saturday Night
Partly cloudy, with a low around 51.
Sunday
A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 79. Breezy.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 44. Breezy.
Monday
A chance of showers and thunderstorms. Partly sunny, with a high near 65.
Monday Night
A slight chance of showers. Mostly cloudy, with a low around 42.
Tuesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 75.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Longmont CO
 40.16°N 105.12°W (Elev. 5000 ft)
Last Update:
12:47 pm MDT May 12, 2026
Forecast Valid:
4pm MDT May 12, 2026-6pm MDT May 19, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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