Severe Weather and Heavy Rain from the Mid-South to the Mid-Atlantic; Building Heat in the West

Severe thunderstorms may bring damaging winds, a couple of tornadoes, and heavy rain across portions of the Mid-Atlantic into the Mid-South. Severe storms may produce hail across the northern/central High Plains. Hazardous heat will linger across the southern U.S. and build across the West through mid-week. Fire weather concerns continue for Interior Alaska and the Four Corners region. Read More >

Current conditions at

Vance Brand Airport (KLMO)

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

Fair

78°F

26°C

Humidity 43%
Wind Speed E 7 mph
Barometer 30.11 in
Dewpoint 53°F (12°C)
Visibility 7.00 mi
Heat Index79°F (26°C)
Last update 22 Jun 12:55 pm MDT
Extended Forecast for

Longmont CO

  • This Afternoon

    This Afternoon: A 30 percent chance of showers and thunderstorms, mainly between 2pm and 5pm.  Mostly sunny, with a high near 90. East wind around 6 mph.

    High: 90 °F

    Chance
    T-storms

  • Tonight

    Tonight: A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and 11pm.  Widespread smoke, mainly between 2am and 4am. Partly cloudy, with a low around 59. East northeast wind 5 to 7 mph becoming light and variable  after midnight.  Chance of precipitation is 20%.

    Low: 59 °F

    Slight Chance
    T-storms then
    Smoke

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms, mainly after 5pm. Some of the storms could be severe.  Increasing clouds, with a high near 84. North northwest wind 5 to 13 mph becoming east northeast in the afternoon. Winds could gust as high as 21 mph.

    High: 84 °F

    Sunny then
    Severe
    Thunderstorms

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms, mainly before 9pm. Some of the storms could be severe.  Partly cloudy, with a low around 58. East wind 5 to 9 mph becoming calm  in the evening. Winds could gust as high as 20 mph.

    Low: 58 °F

    Severe
    Thunderstorms
    then Partly
    Cloudy

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms after noon. Some of the storms could be severe.  Mostly sunny, with a high near 85. Calm wind becoming east 5 to 8 mph in the morning. Winds could gust as high as 20 mph.

    High: 85 °F

    Mostly Sunny
    then Severe
    Thunderstorms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before midnight, then a slight chance of showers. Some of the storms could be severe.  Mostly cloudy, with a low around 57. Chance of precipitation is 30%.

    Low: 57 °F

    Severe
    Thunderstorms
    then Slight
    Chance
    Showers

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms after noon.  Mostly cloudy, with a high near 82.

    High: 82 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before midnight.  Mostly cloudy, with a low around 56.

    Low: 56 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Friday

    Friday: A chance of showers and thunderstorms after noon.  Mostly sunny, with a high near 90.

    High: 90 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms, mainly between 2pm and 5pm. Mostly sunny, with a high near 90. East wind around 6 mph.
Tonight
A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and 11pm. Widespread smoke, mainly between 2am and 4am. Partly cloudy, with a low around 59. East northeast wind 5 to 7 mph becoming light and variable after midnight. Chance of precipitation is 20%.
Tuesday
A 30 percent chance of showers and thunderstorms, mainly after 5pm. Some of the storms could be severe. Increasing clouds, with a high near 84. North northwest wind 5 to 13 mph becoming east northeast in the afternoon. Winds could gust as high as 21 mph.
Tuesday Night
A 40 percent chance of showers and thunderstorms, mainly before 9pm. Some of the storms could be severe. Partly cloudy, with a low around 58. East wind 5 to 9 mph becoming calm in the evening. Winds could gust as high as 20 mph.
Wednesday
A 40 percent chance of showers and thunderstorms after noon. Some of the storms could be severe. Mostly sunny, with a high near 85. Calm wind becoming east 5 to 8 mph in the morning. Winds could gust as high as 20 mph.
Wednesday Night
A chance of showers and thunderstorms before midnight, then a slight chance of showers. Some of the storms could be severe. Mostly cloudy, with a low around 57. Chance of precipitation is 30%.
Thursday
A 50 percent chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 82.
Thursday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 56.
Friday
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 90.
Friday Night
Partly cloudy, with a low around 58.
Saturday
Mostly sunny, with a high near 96. Breezy.
Saturday Night
Mostly clear, with a low around 59. Breezy.
Sunday
Sunny, with a high near 92. Breezy.
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ABOUT THIS FORECAST

 
Point Forecast:
Longmont CO
 40.19°N 105.09°W (Elev. 5010 ft)
12:46 pm MDT Jun 22, 2026
1pm MDT Jun 22, 2026-6pm MDT Jun 28, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database