Johnstown, CO Weather & Climate Normals
Johnstown's real weather, in one number
Johnstown, CO scores 44/100 on this site's reading of NOAA's own 30-year normals: strongly seasonal. Comfortable weather is limited to a shorter window; summers, winters, or precipitation swing wide. 5 of the year's 12 months average between 55 and 75°F, the range this site counts as mild.
Johnstown's hottest and coldest months
Johnstown's hottest month is Jul, averaging 72°F; its coldest is Jan, averaging 28°F, a 43.5°F swing across the year, a middling gap by national standards.
Rain and snow in Johnstown
Johnstown averages 15.6in of precipitation a year across roughly 94 days with measurable rain or snow, and 47in of snow a year.
Where Johnstown ranks
Johnstown ranks 3760 of 4876 US cities in this dataset for comfort score, and 40 of 79 within CO. About 20,639 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from LOVELAND 2N, CO US, 12.7 miles from Johnstown, not a prediction for any specific day.
More on how this is worked out
How the comfort score is calculated · Why some cities show no snow or rain figure