Widespread Excessive Heat and Humidity in Midwest to Spread to East Coast

High pressure building across the Central and Eastern U.S. will produce a dangerous combination of heat and humidity. Heat indices from unusually high dewpoints and well above normal temperatures may reach 110 to 115 degrees. In addition, near record warm low temperatures will limit recovery from hot daytime temperatures. Read More >

Hazardous Weather Conditions

Current conditions at

Vance Brand Airport (KLMO)

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

Fair

100°F

38°C

Humidity 8%
Wind Speed NW 15 G 22 mph
Barometer 29.94 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Heat Index94°F (34°C)
Last update 18 Jul 1:35 pm MDT
Extended Forecast for

Longmont CO

  • This
    Afternoon

    This Afternoon: Sunny and hot, with a high near 100. South wind 9 to 11 mph becoming west. Winds could gust as high as 16 mph.

    Hot

    High: 100 °F

  • Tonight

    Tonight: Mostly clear, with a low around 63. West wind 5 to 10 mph becoming light southwest  after midnight.

    Mostly Clear

    Low: 63 °F

  • Friday

    Friday: Sunny and hot, with a high near 99. Light and variable wind.

    Hot

    High: 99 °F

  • Friday
    Night

    Friday Night: Partly cloudy, with a low around 64. South southeast wind around 5 mph becoming calm  in the evening.

    Partly Cloudy

    Low: 64 °F

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms after noon.  Mostly sunny, with a high near 86. Calm wind becoming northeast around 6 mph in the morning. Winds could gust as high as 15 mph.

    Sunny then
    Chance
    T-storms

    High: 86 °F

  • Saturday
    Night

    Saturday Night: A 30 percent chance of showers and thunderstorms, mainly before midnight.  Partly cloudy, with a low around 60.

    Chance
    T-storms

    Low: 60 °F

  • Sunday

    Sunday: A 50 percent chance of showers and thunderstorms, mainly after noon.  Partly sunny, with a high near 83.

    Slight Chance
    T-storms then
    Chance
    T-storms

    High: 83 °F

  • Sunday
    Night

    Sunday Night: A chance of showers and thunderstorms, mainly before midnight.  Mostly cloudy, with a low around 60.

    Chance
    T-storms

    Low: 60 °F

  • Monday

    Monday: A chance of showers and thunderstorms, mainly after noon.  Mostly sunny, with a high near 85.

    Chance
    T-storms

    High: 85 °F

Detailed Forecast

This Afternoon
Sunny and hot, with a high near 100. South wind 9 to 11 mph becoming west. Winds could gust as high as 16 mph.
Tonight
Mostly clear, with a low around 63. West wind 5 to 10 mph becoming light southwest after midnight.
Friday
Sunny and hot, with a high near 99. Light and variable wind.
Friday Night
Partly cloudy, with a low around 64. South southeast wind around 5 mph becoming calm in the evening.
Saturday
A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 86. Calm wind becoming northeast around 6 mph in the morning. Winds could gust as high as 15 mph.
Saturday Night
A 30 percent chance of showers and thunderstorms, mainly before midnight. Partly cloudy, with a low around 60.
Sunday
A 50 percent chance of showers and thunderstorms, mainly after noon. Partly sunny, with a high near 83.
Sunday Night
A chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 60.
Monday
A chance of showers and thunderstorms, mainly after noon. Mostly sunny, with a high near 85.
Monday Night
A chance of showers and thunderstorms, mainly before midnight. Partly cloudy, with a low around 59.
Tuesday
A chance of showers and thunderstorms. Sunny, with a high near 89.
Tuesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 61.
Wednesday
Showers and thunderstorms likely. Mostly sunny, with a high near 89.
Click Map For Forecast
Point Forecast:
Longmont CO
 40.16°N 105.09°W (Elev. 4980 ft)
11:13 am MDT Jul 18, 2019
1pm MDT Jul 18, 2019-6pm MDT Jul 24, 2019
 
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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