Heat Wave Expands to the East Coast; Flash Flooding Likely in the Central Plains into the Midwest; Severe Thunderstorms in the Northeast

Dangerous, prolonged heat is ongoing in the Mid-South to Mid-Mississippi Valley and heat expands into the Northeast for a brief period today. Widely scattered instances of flash flooding due to heavy rains are forecast from northeast Kansas to much of Indiana. Scattered strong to severe thunderstorms are possible across parts of New England, northern Mid-Atlantic, and North Dakota. Read More >

Hazardous Weather Conditions

Current conditions at

Vance Brand Airport (KLMO)

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

Fair

65°F

18°C

Humidity 44%
Wind Speed Calm
Barometer 30.08 in
Dewpoint 43°F (6°C)
Visibility 7.00 mi
Last update 27 Jul 12:15 am MDT
Extended Forecast for

Longmont CO

  • Overnight

    Overnight: Mostly clear, with a low around 59. West northwest wind around 6 mph.

    Low: 59 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 98. Calm wind becoming southeast 5 to 7 mph in the afternoon.

    High: 98 °F

    Hot

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 62. South wind 5 to 7 mph becoming light and variable.

    Low: 62 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny and hot, with a high near 99. Calm wind becoming south southeast 5 to 8 mph in the afternoon. Winds could gust as high as 17 mph.

    High: 99 °F

    Hot

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 65. South southwest wind 5 to 8 mph becoming light and variable  after midnight. Winds could gust as high as 17 mph.

    Low: 65 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after noon.  Partly sunny, with a high near 91.

    High: 91 °F

    Partly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before midnight, then a slight chance of showers.  Mostly cloudy, with a low around 61. Chance of precipitation is 30%.

    Low: 61 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Wednesday

    Wednesday: Showers and thunderstorms likely, mainly after noon.  Mostly cloudy, with a high near 81.

    High: 81 °F

    T-storms
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before midnight, then a chance of showers.  Mostly cloudy, with a low around 59.

    Low: 59 °F

    Showers
    Likely

Detailed Forecast

Overnight
Mostly clear, with a low around 59. West northwest wind around 6 mph.
Sunday
Sunny and hot, with a high near 98. Calm wind becoming southeast 5 to 7 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 62. South wind 5 to 7 mph becoming light and variable.
Monday
Mostly sunny and hot, with a high near 99. Calm wind becoming south southeast 5 to 8 mph in the afternoon. Winds could gust as high as 17 mph.
Monday Night
Mostly cloudy, with a low around 65. South southwest wind 5 to 8 mph becoming light and variable after midnight. Winds could gust as high as 17 mph.
Tuesday
A 30 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 91.
Tuesday Night
A chance of showers and thunderstorms before midnight, then a slight chance of showers. Mostly cloudy, with a low around 61. Chance of precipitation is 30%.
Wednesday
Showers and thunderstorms likely, mainly after noon. Mostly cloudy, with a high near 81.
Wednesday Night
Showers likely and possibly a thunderstorm before midnight, then a chance of showers. Mostly cloudy, with a low around 59.
Thursday
A slight chance of showers, then showers and thunderstorms likely after noon. Mostly cloudy, with a high near 79.
Thursday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 59.
Friday
Showers and thunderstorms likely. Partly sunny, with a high near 83.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 58.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 89.
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ABOUT THIS FORECAST

 
Point Forecast:
Longmont CO
 40.19°N 105.09°W (Elev. 5010 ft)
2:13 pm MDT Jul 26, 2025
12am MDT Jul 27, 2025-6pm MDT Aug 2, 2025
 
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Additional Resources

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Hourly Weather Forecast

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