Romeoville, IL Weather & Climate Normals
What a normal year in Romeoville actually looks like
On the 30-year record NOAA keeps for Romeoville, IL, the comfort score comes out to 44/100, 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 Romeoville's weather actually swings
Average temperatures in Romeoville run from 24°F in Jan up to 75°F in Jul, a 50.7°F seasonal swing, one of the widest gaps in this dataset.
How wet Romeoville actually gets
Over a typical year, Romeoville sees about 41.14in of precipitation a year across roughly 127 days with measurable rain or snow, with 33.2in of snow a year.
Romeoville against the rest of the country
Out of 4876 cities scored here, Romeoville comes in at 3702; within IL alone it ranks 169 of 330. Population is about 41,177.
Checking the actual forecast
These figures come from ROMEOVILLE WFO, IL US, the NOAA station 1.8 miles from Romeoville, averaged over 30 years, not tomorrow's forecast.
More on how this is worked out
Why this uses the nearest NOAA station · How the comfort score is calculated