Weather forecast for: Johnstown CO
Last Update: 12:46 am MDT Sep 3, 2026
Today: Sunny, with a high near 92. Calm wind becoming southeast 5 to 9 mph in the morning. Winds could gust as high as 15 mph.
Tonight: Partly cloudy, with a low around 58. Southeast wind 5 to 8 mph becoming northwest after midnight.
Friday: Sunny, with a high near 92. Light and variable wind becoming east southeast 5 to 7 mph in the afternoon. Winds could gust as high as 17 mph.
Friday Night: Partly cloudy, with a low around 60. South southwest wind 5 to 7 mph becoming light and variable. Winds could gust as high as 15 mph.
Saturday: Mostly sunny, with a high near 92. Light and variable wind becoming southeast 5 to 8 mph in the morning. Winds could gust as high as 16 mph.
Saturday Night: Mostly cloudy, with a low around 62.
Sunday: A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 90.
Sunday Night: A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 61.
Labor Day: A chance of showers and thunderstorms after noon. Partly sunny, with a high near 89.
Monday Night: A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 59.
Tuesday: A chance of showers and thunderstorms. Mostly sunny, with a high near 87.
Tuesday Night: A chance of showers. Partly cloudy, with a low around 58.
Wednesday: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 84.
WeatherWorld.com
Town of Johnstown, CO
