Weather forecast for: Johnstown CO
Last Update: 12:46 pm MDT Oct 30, 2026
This Afternoon: Mostly sunny, with a high near 62. East wind 3 to 5 mph.
Tonight: Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 41. East wind around 5 mph becoming light and variable in the evening.
Saturday: Patchy fog before 10am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 61. Calm wind becoming east northeast around 6 mph.
Saturday Night: Increasing clouds, with a low around 40. Light and variable wind.
Sunday: Cloudy, with a high near 60. Calm wind becoming north northeast around 5 mph in the afternoon.
Sunday Night: Mostly cloudy, with a low around 45.
Monday: A 40 percent chance of showers. Mostly cloudy, with a high near 58. Windy.
Monday Night: Mostly cloudy, with a low around 40. Breezy.
Tuesday: Sunny, with a high near 60.
Tuesday Night: Mostly clear, with a low around 37.
Wednesday: Sunny, with a high near 58.
Wednesday Night: Partly cloudy, with a low around 36.
Thursday: Mostly sunny, with a high near 54.
WeatherWorld.com
Town of Johnstown, CO
