National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Areas of Excessive Rainfall and Severe Thunderstorms Today

Heavy to excessive rainfall from thunderstorms may bring areas of flooding today across parts of Texas, the Southeast U.S., and the lower Ohio Valley. Severe thunderstorms with large hail, damaging wind gusts, and a couple tornadoes are expected this afternoon and evening across parts of west and southwest Texas. Read More >

Current conditions at

Vance Brand Airport (KLMO)

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

Partly Cloudy

78°F

26°C

Humidity 26%
Wind Speed SE 12 G 23 mph
Barometer 29.82 in
Dewpoint 40°F (4°C)
Visibility 7.00 mi
Heat Index78°F (26°C)
Last update 26 May 5:35 pm MDT
Extended Forecast for

Longmont CO

  • This Afternoon

    This Afternoon: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a steady temperature around 77. Breezy, with a south southeast wind around 18 mph, with gusts as high as 30 mph.

    High: 77 °F

    Slight Chance
    T-storms and
    Breezy

  • Tonight

    Tonight: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Mostly cloudy, with a low around 55. Breezy, with a south southeast wind 11 to 16 mph becoming light and variable after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 30%.

    Low: 55 °F

    Chance
    Showers and
    Breezy then
    Mostly Cloudy

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm, mainly after noon. Mostly cloudy, with a high near 74. Calm wind becoming east southeast 5 to 8 mph in the afternoon. Chance of precipitation is 60%.

    High: 74 °F

    Chance
    Showers then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Mostly cloudy, with a low around 54. South southwest wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 40%.

    Low: 54 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 79. Calm wind becoming southeast 5 to 7 mph in the afternoon. Winds could gust as high as 16 mph.

    High: 79 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 54.

    Low: 54 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

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

    Low: 54 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Saturday

    Saturday: A chance of showers and thunderstorms after noon. Partly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a steady temperature around 77. Breezy, with a south southeast wind around 18 mph, with gusts as high as 30 mph.
Tonight
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Mostly cloudy, with a low around 55. Breezy, with a south southeast wind 11 to 16 mph becoming light and variable after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 30%.
Wednesday
Showers likely and possibly a thunderstorm, mainly after noon. Mostly cloudy, with a high near 74. Calm wind becoming east southeast 5 to 8 mph in the afternoon. Chance of precipitation is 60%.
Wednesday Night
A chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Mostly cloudy, with a low around 54. South southwest wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 40%.
Thursday
A 40 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 79. Calm wind becoming southeast 5 to 7 mph in the afternoon. Winds could gust as high as 16 mph.
Thursday Night
A 40 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 54.
Friday
A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 82.
Friday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 54.
Saturday
A chance of showers and thunderstorms after noon. Partly sunny, with a high near 79.
Saturday Night
A chance of showers and thunderstorms before midnight, then a slight chance of showers. Partly cloudy, with a low around 51.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 80.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 52.
Monday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 79.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 52.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 78.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Longmont CO
 40.18°N 105.12°W (Elev. 5030 ft)
Last Update:
12:46 pm MDT May 26, 2026
Forecast Valid:
5pm MDT May 26, 2026-6pm MDT Jun 2, 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