Unsettled Weather in the Eastern U.S. through Memorial Day

Showers and thunderstorms are expected from Texas to the Northeast through Tuesday. Heavy rain will create mainly localized areas of flash flooding across the central Gulf Coast into the Appalachians. Elevated to Critical fire weather conditions due to gusty winds and low humidity are expected through Tuesday across Oregon and Nevada. Showers and thunderstorms will develop over the Northwest. Read More >

Current conditions at

Vance Brand Airport (KLMO)

Lat: 40.16°NLon: 105.16°WElev: 5039ft.

Fair

63°F

17°C

Humidity 53%
Wind Speed Calm
Barometer 29.97 in
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 25 May 10:15 pm MDT
Extended Forecast for

Longmont CO

  • Tonight

    Tonight: Mostly cloudy, with a low around 54. West southwest wind around 5 mph becoming calm  after midnight.

    Low: 54 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after noon.  Mostly sunny, with a high near 80. Breezy, with a light and variable wind becoming south southeast 15 to 20 mph in the morning. Winds could gust as high as 31 mph.

    High: 80 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms and
    Breezy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 55. Breezy, with a south southeast wind 13 to 18 mph becoming light and variable  after midnight. Winds could gust as high as 26 mph.

    Low: 55 °F

    Mostly Cloudy
    and Breezy
    then Mostly
    Cloudy

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm after noon.  Mostly cloudy, with a high near 76. Light and variable wind becoming east southeast 5 to 9 mph in the afternoon. Winds could gust as high as 18 mph.  Chance of precipitation is 70%.

    High: 76 °F

    Partly Sunny
    then Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before midnight.  Mostly cloudy, with a low around 53. East wind 5 to 7 mph becoming calm  in the evening. Winds could gust as high as 16 mph.  Chance of precipitation is 60%.

    Low: 53 °F

    Showers
    Likely then
    Mostly Cloudy

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms after noon.  Partly sunny, with a high near 80.

    High: 80 °F

    Partly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms before midnight.  Partly cloudy, with a low around 55.

    Low: 55 °F

    Chance
    Showers then
    Partly Cloudy

  • Friday

    Friday: A slight chance of showers and thunderstorms after noon.  Mostly sunny, with a high near 81.

    High: 81 °F

    Sunny then
    Slight Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before midnight, then a slight chance of showers.  Mostly cloudy, with a low around 54.

    Low: 54 °F

    Chance
    T-storms then
    Slight Chance
    Showers

Detailed Forecast

Tonight
Mostly cloudy, with a low around 54. West southwest wind around 5 mph becoming calm after midnight.
Tuesday
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 80. Breezy, with a light and variable wind becoming south southeast 15 to 20 mph in the morning. Winds could gust as high as 31 mph.
Tuesday Night
Mostly cloudy, with a low around 55. Breezy, with a south southeast wind 13 to 18 mph becoming light and variable after midnight. Winds could gust as high as 26 mph.
Wednesday
Showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 76. Light and variable wind becoming east southeast 5 to 9 mph in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 70%.
Wednesday Night
Showers likely and possibly a thunderstorm before midnight. Mostly cloudy, with a low around 53. East wind 5 to 7 mph becoming calm in the evening. Winds could gust as high as 16 mph. Chance of precipitation is 60%.
Thursday
A 30 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 80.
Thursday Night
A 40 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 55.
Friday
A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 81.
Friday Night
A chance of showers and thunderstorms before midnight, then a slight chance of showers. Mostly cloudy, with a low around 54.
Saturday
A chance of showers and thunderstorms after noon. Partly sunny, with a high near 78.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 53.
Sunday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 77.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 52.
Monday
A chance of showers and thunderstorms. Partly sunny, with a high near 77.
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ABOUT THIS FORECAST

 
Point Forecast:
Longmont CO
 40.19°N 105.09°W (Elev. 5010 ft)
12:45 pm MDT May 25, 2026
10pm MDT May 25, 2026-6pm MDT Jun 1, 2026
 
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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