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: 3:59 am MDT May 18, 2024		Print

  • Today

    Today: A 30 percent chance of showers and thunderstorms, mainly after 5pm. Mostly sunny, with a high near 26. Northeast wind 5 to 10 km/h becoming south southeast 13 to 18 km/h in the morning. Winds could gust as high as 29 km/h.

    High: 26 °C

    Sunny then
    Chance
    Showers

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 10. South wind 13 to 18 km/h becoming southwest 5 to 10 km/h after midnight. Winds could gust as high as 29 km/h.

    Low: 10 °C

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 28. Breezy, with a west wind 5 to 10 km/h increasing to 19 to 24 km/h in the afternoon. Winds could gust as high as 29 km/h.

    High: 28 °C

    Mostly Sunny
    then Mostly
    Sunny and
    Breezy

  • Sunday
    Night

    Sunday Night: A 10 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 9. West northwest wind 10 to 18 km/h, with gusts as high as 35 km/h.

    Low: 9 °C

    Slight Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 22. North wind 8 to 14 km/h becoming east in the afternoon. Winds could gust as high as 32 km/h.

    High: 22 °C

    Mostly Sunny
    then Chance
    T-storms

  • Monday
    Night

    Monday Night: Showers and thunderstorms likely before 3am, then a chance of showers. Mostly cloudy, with a low around 8. Chance of precipitation is 60%.

    Low: 8 °C

    T-storms
    Likely


  • Tuesday

    Tuesday: A chance of showers before 9am, then a chance of showers and thunderstorms between 9am and noon, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 16. Chance of precipitation is 70%.

    High: 16 °C

    Chance
    Showers then
    Showers
    Likely

  • Tuesday
    Night

    Tuesday Night: A chance of showers and thunderstorms before midnight, then a slight chance of showers. Mostly cloudy, with a low around 4.

    Low: 4 °C

    Chance
    Showers


  • Wednesday

    Wednesday: A slight chance of showers, with thunderstorms also possible after noon. Mostly sunny, with a high near 20.

    High: 20 °C

    Slight Chance
    Showers then
    Slight Chance
    T-storms



    • Today: A 30 percent chance of showers and thunderstorms, mainly after 5pm. Mostly sunny, with a high near 26. Northeast wind 5 to 10 km/h becoming south southeast 13 to 18 km/h in the morning. Winds could gust as high as 29 km/h.

    Tonight: A 20 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 10. South wind 13 to 18 km/h becoming southwest 5 to 10 km/h after midnight. Winds could gust as high as 29 km/h.

    Sunday: Mostly sunny, with a high near 28. Breezy, with a west wind 5 to 10 km/h increasing to 19 to 24 km/h in the afternoon. Winds could gust as high as 29 km/h.

    Sunday Night: A 10 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 9. West northwest wind 10 to 18 km/h, with gusts as high as 35 km/h.

    Monday: A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 22. North wind 8 to 14 km/h becoming east in the afternoon. Winds could gust as high as 32 km/h.

    Monday Night: Showers and thunderstorms likely before 3am, then a chance of showers. Mostly cloudy, with a low around 8. Chance of precipitation is 60%.

    Tuesday: A chance of showers before 9am, then a chance of showers and thunderstorms between 9am and noon, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 16. Chance of precipitation is 70%.

    Tuesday Night: A chance of showers and thunderstorms before midnight, then a slight chance of showers. Mostly cloudy, with a low around 4.

    Wednesday: A slight chance of showers, with thunderstorms also possible after noon. Mostly sunny, with a high near 20.

    Wednesday Night: A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 6.

    Thursday: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 24.

    Thursday Night: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 8.

    Friday: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 23.


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

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