Riverdale, IL Weather & Climate Normals
What a normal year in Riverdale actually looks like
On the 30-year record NOAA keeps for Riverdale, IL, the comfort score comes out to 43/100, strongly seasonal: Comfortable weather is limited to a shorter window; summers, winters, or precipitation swing wide. Only 5 months a year land in the 55–75°F range this site treats as mild.
How much Riverdale's weather actually swings
Average temperatures in Riverdale run from 26°F in Jan up to 77°F in Jul, a 50.5°F seasonal swing, one of the widest gaps in this dataset.
How wet Riverdale actually gets
Over a typical year, Riverdale sees about 40.88in of precipitation a year across roughly 127 days with measurable rain or snow, with 38.8in of snow a year.
Riverdale against the rest of the country
Out of 4876 cities scored here, Riverdale comes in at 4070; within IL alone it ranks 267 of 330. Population is about 10,299.
Checking the actual forecast
These figures come from CHICAGO MIDWAY AP 3SW, IL US, the NOAA station 9.8 miles from Riverdale, averaged over 30 years, not tomorrow's forecast.
More on how this is worked out
Why some cities show no snow or rain figure · What a 30-year climate normal actually is