Longmont, CO Weather & Climate Normals
Longmont's real weather, in one number
Longmont, CO scores 50/100 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.
Longmont's hottest and coldest months
Longmont's hottest month is Jul, averaging 73°F; its coldest is Jan, averaging 30°F, a 43.6°F swing across the year, a middling gap by national standards.
Rain and snow in Longmont
Over a typical year, Longmont sees about 15.21in of precipitation a year across roughly 72 days with measurable rain or snow. That station has no snowfall reading, so none is shown rather than assumed.
Where Longmont ranks
Longmont ranks 1644 of 4876 US cities in this dataset for comfort score, and 6 of 79 within CO. About 99,818 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from LONGMONT 2 ESE, CO US, 1.2 miles from Longmont, not a prediction for any specific day.
More on how this is worked out
Why some cities show no snow or rain figure · How the comfort score is calculated