Flooding Possible in the Southwest U.S.; Coastal Storm to Impact the East

Heavy to excessive rainfall is expected today into Wednesday over New Mexico into far west Texas. Flash flooding and debris flows in wildfire burn areas will be possible. A strong coastal storm will develop off the Mid-Atlantic coast Wednesday, intensifying toward southern New England this weekend. Significant coastal flooding, strong rip currents, and beach erosion from high surf expected. Read More >

Current conditions at

Vance Brand Airport (KLMO)

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

Fair

62°F

17°C

Humidity 64%
Wind Speed W 3 mph
Barometer 30.11 in
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 23 Sep 12:35 am MDT
Extended Forecast for

Longmont CO

  • Overnight

    Overnight: Mostly cloudy, with a low around 54. Light and variable wind.

    Low: 54 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers between 1pm and 3pm, then a chance of showers and thunderstorms after 3pm.  Mostly cloudy, with a high near 79. Calm wind becoming east northeast around 6 mph in the afternoon.  Chance of precipitation is 30%.

    High: 79 °F

    Mostly Cloudy
    then Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers.  Cloudy, with a low around 56. Light and variable wind.

    Low: 56 °F

    Chance
    Showers

  • Thursday

    Thursday: Showers, with thunderstorms also possible after 3pm.  High near 70. Calm wind becoming east northeast around 6 mph in the afternoon.  Chance of precipitation is 80%.

    High: 70 °F

    Showers

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 9pm, then showers likely between 9pm and midnight.  Mostly cloudy, with a low around 53. Light and variable wind.  Chance of precipitation is 60%.

    Low: 53 °F

    Showers
    Likely then
    Mostly Cloudy

  • Friday

    Friday: A slight chance of showers between noon and 3pm, then a slight chance of showers and thunderstorms after 3pm.  Mostly sunny, with a high near 77. Chance of precipitation is 20%.

    High: 77 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

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

    Low: 52 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Saturday Night

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

    Low: 52 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 54. Light and variable wind.
Wednesday
A slight chance of showers between 1pm and 3pm, then a chance of showers and thunderstorms after 3pm. Mostly cloudy, with a high near 79. Calm wind becoming east northeast around 6 mph in the afternoon. Chance of precipitation is 30%.
Wednesday Night
A 40 percent chance of showers. Cloudy, with a low around 56. Light and variable wind.
Thursday
Showers, with thunderstorms also possible after 3pm. High near 70. Calm wind becoming east northeast around 6 mph in the afternoon. Chance of precipitation is 80%.
Thursday Night
Showers likely and possibly a thunderstorm before 9pm, then showers likely between 9pm and midnight. Mostly cloudy, with a low around 53. Light and variable wind. Chance of precipitation is 60%.
Friday
A slight chance of showers between noon and 3pm, then a slight chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 77. Chance of precipitation is 20%.
Friday Night
Partly cloudy, with a low around 52.
Saturday
Sunny, with a high near 83.
Saturday Night
Partly cloudy, with a low around 52.
Sunday
Mostly sunny, with a high near 83.
Sunday Night
Mostly cloudy, with a low around 54.
Monday
A slight chance of showers and thunderstorms. Partly sunny, with a high near 80.
Monday Night
A chance of showers. Mostly cloudy, with a low around 51.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 72.
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ABOUT THIS FORECAST

 
Point Forecast:
Longmont CO
 40.16°N 105.15°W (Elev. 5007 ft)
3:01 pm MDT Sep 22, 2026
12am MDT Sep 23, 2026-6pm MDT Sep 29, 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