Heavy to Excessive Rains in The Four Corners Region and Midwest; Heat Persists in the South-Central U.S.

Repeated rounds of showers and thunderstorms could bring a flash flooding threat across the Four Corners region and from the mid-Mississippi Valley into the lower Great Lakes. Hot temperatures and high humidity will continue to challenge daily records from the Southern Plains to the lower Mississippi Valley. Read More >

Current conditions at

Vance Brand Airport (KLMO)

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

Fair

53°F

12°C

Humidity 71%
Wind Speed Calm
Barometer 30.23 in
Dewpoint 44°F (7°C)
Visibility 7.00 mi
Last update 16 Sep 7:55 am MDT
Extended Forecast for

Longmont CO

  • Today

    Today: A 20 percent chance of showers and thunderstorms after 4pm.  Partly sunny, with a high near 83. Calm wind becoming east around 5 mph in the afternoon.

    High: 83 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 59. West northwest wind around 5 mph becoming calm  in the evening.  Chance of precipitation is 30%.

    Low: 59 °F

    Chance
    Showers

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after noon.  Mostly cloudy, with a high near 77. Calm wind becoming north northwest around 5 mph in the afternoon.  Chance of precipitation is 50%.

    High: 77 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 20 percent chance of showers before midnight.  Mostly cloudy, with a low around 56. Northwest wind around 5 mph becoming calm  in the evening.

    Low: 56 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms after noon.  Partly sunny, with a high near 80. Calm wind becoming south around 6 mph in the afternoon.

    High: 80 °F

    Partly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight.  Partly cloudy, with a low around 53. Chance of precipitation is 30%.

    Low: 53 °F

    Chance
    Showers then
    Partly Cloudy

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm after noon.  Partly sunny, with a high near 77. Chance of precipitation is 60%.

    High: 77 °F

    Mostly Sunny
    then Showers
    Likely

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before midnight, then a slight chance of showers.  Mostly cloudy, with a low around 50.

    Low: 50 °F

    Chance
    Showers

  • Sunday

    Sunday: A chance of showers and thunderstorms after noon.  Mostly sunny, with a high near 75.

    High: 75 °F

    Sunny then
    Chance
    Showers

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 83. Calm wind becoming east around 5 mph in the afternoon.
Tonight
A chance of showers and thunderstorms. Mostly cloudy, with a low around 59. West northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Thursday
A chance of showers, with thunderstorms also possible after noon. Mostly cloudy, with a high near 77. Calm wind becoming north northwest around 5 mph in the afternoon. Chance of precipitation is 50%.
Thursday Night
A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 56. Northwest wind around 5 mph becoming calm in the evening.
Friday
A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 80. Calm wind becoming south around 6 mph in the afternoon.
Friday Night
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Partly cloudy, with a low around 53. Chance of precipitation is 30%.
Saturday
Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 77. Chance of precipitation is 60%.
Saturday Night
A chance of showers and thunderstorms before midnight, then a slight chance of showers. Mostly cloudy, with a low around 50.
Sunday
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 75.
Sunday Night
A chance of showers, mainly before midnight. Partly cloudy, with a low around 49.
Monday
A slight chance of showers. Mostly sunny, with a high near 74.
Monday Night
A slight chance of showers. Partly cloudy, with a low around 49.
Tuesday
Mostly sunny, with a high near 77.
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ABOUT THIS FORECAST

 
Point Forecast:
Longmont CO
 40.16°N 105.12°W (Elev. 5000 ft)
12:46 am MDT Sep 16, 2026
8am MDT Sep 16, 2026-6pm MDT Sep 22, 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