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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: 2:21 pm MST Dec 4, 2025		Print

  • Overnight

    Overnight: Mostly cloudy, with a steady temperature around 18. West southwest wind around 5 mph becoming light and variable.

    Low: 18 °F

    Mostly Cloudy




  • Friday

    Friday: Partly sunny, with a high near 35. Light and variable wind becoming east around 6 mph in the morning.

    High: 35 °F

    Partly Sunny




  • Friday
    Night

    Friday Night: Mostly cloudy, with a low around 17. South wind 3 to 5 mph.

    Low: 17 °F

    Mostly Cloudy




  • Saturday

    Saturday: A slight chance of snow showers, mixing with rain after 8am, then gradually ending. Mostly sunny, with a high near 46. Breezy, with a northwest wind 8 to 16 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.

    High: 46 °F

    Slight Chance
    Rain/Snow
    then Mostly
    Sunny and
    Breezy

  • Saturday
    Night

    Saturday Night: Partly cloudy, with a low around 19. West northwest wind 5 to 8 mph.

    Low: 19 °F

    Partly Cloudy




  • Sunday

    Sunday: Sunny, with a high near 42.

    High: 42 °F

    Sunny




  • Sunday
    Night

    Sunday Night: Partly cloudy, with a low around 19.

    Low: 19 °F

    Partly Cloudy




  • Monday

    Monday: Mostly sunny, with a high near 48.

    High: 48 °F

    Mostly Sunny




  • Monday
    Night

    Monday Night: Partly cloudy, with a low around 24.

    Low: 24 °F

    Partly Cloudy






    • Overnight: Mostly cloudy, with a steady temperature around 18. West southwest wind around 5 mph becoming light and variable.

    Friday: Partly sunny, with a high near 35. Light and variable wind becoming east around 6 mph in the morning.

    Friday Night: Mostly cloudy, with a low around 17. South wind 3 to 5 mph.

    Saturday: A slight chance of snow showers, mixing with rain after 8am, then gradually ending. Mostly sunny, with a high near 46. Breezy, with a northwest wind 8 to 16 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.

    Saturday Night: Partly cloudy, with a low around 19. West northwest wind 5 to 8 mph.

    Sunday: Sunny, with a high near 42.

    Sunday Night: Partly cloudy, with a low around 19.

    Monday: Mostly sunny, with a high near 48.

    Monday Night: Partly cloudy, with a low around 24.

    Tuesday: Partly sunny, with a high near 52.

    Tuesday Night: A slight chance of rain and snow showers. Mostly cloudy, with a low around 32.

    Wednesday: A chance of rain and snow showers. Partly sunny, with a high near 51.

    Wednesday Night: A chance of rain and snow showers. Mostly cloudy, with a low around 29.

    Thursday: A slight chance of rain and snow showers. Mostly sunny, with a high near 51.


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

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