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National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
7-Day Forecast 40.16°N 105.09°W (Text-Only)
NWS Forecast for: Longmont CO
Issued by: National Weather Service Denver-Boulder, CO
Last Update: 12:45 pm MDT Jun 29, 2026		Print

  • Tonight

    Tonight: Patchy smoke. Mostly clear, with a low around 55. West northwest wind 5 to 9 mph becoming light after midnight. Winds could gust as high as 15 mph.

    Low: 55 °F

    Patchy Smoke


  • Tuesday

    Tuesday: Areas of smoke between 11am and noon. Mostly sunny, with a high near 90. Light and variable wind becoming east northeast 5 to 10 mph in the morning. Winds could gust as high as 16 mph.

    High: 90 °F

    Areas Smoke
    then Mostly
    Sunny

  • Tuesday
    Night

    Tuesday Night: Patchy smoke before midnight, then patchy smoke after 4am. Partly cloudy, with a low around 56. North northeast wind 6 to 11 mph becoming light and variable after midnight. Winds could gust as high as 18 mph.

    Low: 56 °F

    Patchy Smoke


  • Wednesday

    Wednesday: Patchy smoke before 7am. Sunny, with a high near 90. Calm wind becoming east southeast 5 to 9 mph in the morning. Winds could gust as high as 20 mph.

    High: 90 °F

    Patchy Smoke
    then Mostly
    Sunny

  • Wednesday
    Night

    Wednesday Night: Partly cloudy, with a low around 57. East northeast wind 5 to 9 mph becoming light and variable after midnight. Winds could gust as high as 20 mph.

    Low: 57 °F

    Partly Cloudy


  • Thursday

    Thursday: Sunny, with a high near 92.

    High: 92 °F

    Sunny


  • Thursday
    Night

    Thursday Night: Partly cloudy, with a low around 59.

    Low: 59 °F

    Partly Cloudy


  • Friday

    Friday: Sunny, with a high near 96.

    High: 96 °F

    Sunny


  • Friday
    Night

    Friday Night: Partly cloudy, with a low around 62.

    Low: 62 °F

    Partly Cloudy




    • Tonight: Patchy smoke. Mostly clear, with a low around 55. West northwest wind 5 to 9 mph becoming light after midnight. Winds could gust as high as 15 mph.

    Tuesday: Areas of smoke between 11am and noon. Mostly sunny, with a high near 90. Light and variable wind becoming east northeast 5 to 10 mph in the morning. Winds could gust as high as 16 mph.

    Tuesday Night: Patchy smoke before midnight, then patchy smoke after 4am. Partly cloudy, with a low around 56. North northeast wind 6 to 11 mph becoming light and variable after midnight. Winds could gust as high as 18 mph.

    Wednesday: Patchy smoke before 7am. Sunny, with a high near 90. Calm wind becoming east southeast 5 to 9 mph in the morning. Winds could gust as high as 20 mph.

    Wednesday Night: Partly cloudy, with a low around 57. East northeast wind 5 to 9 mph becoming light and variable after midnight. Winds could gust as high as 20 mph.

    Thursday: Sunny, with a high near 92.

    Thursday Night: Partly cloudy, with a low around 59.

    Friday: Sunny, with a high near 96.

    Friday Night: Partly cloudy, with a low around 62.

    Independence Day: Mostly sunny, with a high near 93.

    Saturday Night: Partly cloudy, with a low around 59.

    Sunday: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 91.

    Sunday Night: Partly cloudy, with a low around 61.

    Monday: Sunny, with a high near 94.


    Longmont CO
     40.16°N 105.09°W (Elev. 4980 ft)

    Visit your local NWS office at: https://www.weather.gov/bou