current weather in johnstown colorado
Johnstown, CO Weather Forecast. 8:28 AM MST Sun Feb 4 2018. REST OF TODAY - Mostly cloudy. Chance of snow in the morning, then a slight chance of snow in the afternoon. Highs 26 to 34. Chance of precipitation 30 percent. TONIGHT - Partly cloudy. Lows 22 to 28. West winds 10 to 15 mph after midnight.