Chatham, NJ Weather & Climate Normals
Chatham's real weather, in one number
Chatham, NJ scores 42/100 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. 4 of the year's 12 months average between 55 and 75°F, the range this site counts as mild.
Chatham's hottest and coldest months
Chatham's hottest month is Jul, averaging 76°F; its coldest is Jan, averaging 31°F, a 45.2°F swing across the year, one of the widest gaps in this dataset.
Rain and snow in Chatham
Chatham averages 50.4in of precipitation a year across roughly 123 days with measurable rain or snow, and 24in of snow a year.
Where Chatham ranks
Chatham ranks 4260 of 4876 US cities in this dataset for comfort score, and 180 of 194 within NJ. About 10,062 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from CANOE BROOK, NJ US, 1.6 miles from Chatham, 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