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National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
7-Day Forecast 40.33°N 104.93°W (Text-Only)
NWS Forecast for: Johnstown CO
Issued by: National Weather Service Denver-Boulder, CO
Last Update: 2:26 am MDT Jun 30, 2026		Print

  • Today

    Today: A 20 percent chance of showers and thunderstorms after 3pm. Increasing clouds, with a high near 91. Breezy, with a light and variable wind becoming southeast 10 to 15 mph in the morning. Winds could gust as high as 22 mph.

    High: 91 °F

    Sunny then
    Slight Chance
    T-storms and
    Breezy

  • Tonight

    Tonight: Patchy smoke between 9pm and 10pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 55. West northwest wind 5 to 11 mph becoming north northeast in the evening. Winds could gust as high as 22 mph.

    Low: 55 °F

    Patchy Smoke
    then Mostly
    Clear

  • Wednesday

    Wednesday: Patchy smoke before 3pm, then patchy smoke after 5pm. Increasing clouds, with a high near 90. West wind 5 to 13 mph becoming east southeast in the afternoon. Winds could gust as high as 22 mph.

    High: 90 °F

    Sunny then
    Patchy Smoke


  • Wednesday
    Night

    Wednesday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 57. East southeast wind 5 to 14 mph becoming northwest after midnight. Winds could gust as high as 24 mph.

    Low: 57 °F

    Decreasing
    Clouds


  • Thursday

    Thursday: Sunny, with a high near 94. Calm wind becoming southeast 5 to 8 mph in the afternoon. Winds could gust as high as 21 mph.

    High: 94 °F

    Sunny



  • Thursday
    Night

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

    Low: 59 °F

    Partly Cloudy



  • Friday

    Friday: Sunny and hot, with a high near 98.

    High: 98 °F

    Hot



  • Friday
    Night

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

    Low: 61 °F

    Partly Cloudy



  • Independence
    Day

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

    High: 93 °F

    Mostly Sunny





    • Today: A 20 percent chance of showers and thunderstorms after 3pm. Increasing clouds, with a high near 91. Breezy, with a light and variable wind becoming southeast 10 to 15 mph in the morning. Winds could gust as high as 22 mph.

    Tonight: Patchy smoke between 9pm and 10pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 55. West northwest wind 5 to 11 mph becoming north northeast in the evening. Winds could gust as high as 22 mph.

    Wednesday: Patchy smoke before 3pm, then patchy smoke after 5pm. Increasing clouds, with a high near 90. West wind 5 to 13 mph becoming east southeast in the afternoon. Winds could gust as high as 22 mph.

    Wednesday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 57. East southeast wind 5 to 14 mph becoming northwest after midnight. Winds could gust as high as 24 mph.

    Thursday: Sunny, with a high near 94. Calm wind becoming southeast 5 to 8 mph in the afternoon. Winds could gust as high as 21 mph.

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

    Friday: Sunny and hot, with a high near 98.

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

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

    Saturday Night: Partly cloudy, with a low around 58.

    Sunday: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 92. Breezy.

    Sunday Night: Partly cloudy, with a low around 60. Breezy.

    Monday: Sunny, with a high near 96.


    Johnstown CO
     40.33°N 104.93°W (Elev. 4846 ft)

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