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

Areas of Dangerous Heat and Heavy Rain with Possible Flooding into this Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend with heat advisories in effect. Heavy to excessive rainfall occurring at times through Sunday could bring areas of flooding to parts of the upper Midwest, central Great Lakes, southern New England and Virginia/North Carolina tidewater region. Read More >

Current conditions at

Vance Brand Airport (KLMO)

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

Mostly Cloudy

63°F

17°C

Humidity 77%
Wind Speed Calm
Barometer 30.24 in
Dewpoint 56°F (13°C)
Visibility 7.00 mi
Last update 17 Sep 9:35 pm MDT
Extended Forecast for

2 Miles ESE Longmont CO

  • Tonight

    Tonight: A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 58. North wind around 5 mph becoming calm in the evening.

    Low: 58 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Friday

    Friday: Showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 83. Calm wind becoming southwest 5 to 8 mph in the afternoon. Chance of precipitation is 70%.

    High: 83 °F

    Mostly Sunny
    then Showers
    Likely

  • Friday Night

    Friday 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 around 6 mph becoming calm in the evening. Winds could gust as high as 15 mph. Chance of precipitation is 40%.

    Low: 54 °F

    Chance
    Showers then
    Partly Cloudy

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 79. Calm wind becoming east northeast around 5 mph in the afternoon. Winds could gust as high as 15 mph. Chance of precipitation is 70%.

    High: 79 °F

    Partly Sunny
    then Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 50. East southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 70%.

    Low: 50 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Sunday

    Sunday: A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 73. Chance of precipitation is 50%.

    High: 73 °F

    Chance
    Showers then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 50 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 48.

    Low: 48 °F

    Chance
    Showers then
    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 50.

    Low: 50 °F

    Chance
    Showers then
    Partly Cloudy

Detailed Forecast

Tonight
A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 58. North wind around 5 mph becoming calm in the evening.
Friday
Showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 83. Calm wind becoming southwest 5 to 8 mph in the afternoon. Chance of precipitation is 70%.
Friday 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 around 6 mph becoming calm in the evening. Winds could gust as high as 15 mph. Chance of precipitation is 40%.
Saturday
Showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 79. Calm wind becoming east northeast around 5 mph in the afternoon. Winds could gust as high as 15 mph. Chance of precipitation is 70%.
Saturday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 50. East southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 70%.
Sunday
A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 73. Chance of precipitation is 50%.
Sunday Night
A 50 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 48.
Monday
Mostly sunny, with a high near 75.
Monday Night
A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 50.
Tuesday
A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 77.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 50.
Wednesday
Mostly sunny, with a high near 80.
Wednesday Night
A slight chance of showers. Partly cloudy, with a low around 52.
Thursday
Mostly sunny, with a high near 82.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ESE Longmont CO
 40.17°N 105.06°W (Elev. 5000 ft)
Last Update:
12:46 pm MDT Sep 17, 2026
Forecast Valid:
9pm MDT Sep 17, 2026-6pm MDT Sep 24, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation