Wilmington, IL Weather & Climate Normals
What a normal year in Wilmington actually looks like
On the 30-year record NOAA keeps for Wilmington, IL, the comfort score comes out to 46/100, 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 Wilmington's weather actually swings
Average temperatures in Wilmington 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 Wilmington actually gets
Over a typical year, Wilmington sees about 37.22in of precipitation a year across roughly 120 days with measurable rain or snow, with 18.4in of snow a year.
Wilmington against the rest of the country
Out of 4876 cities scored here, Wilmington comes in at 3187; within IL alone it ranks 111 of 330. Population is about 5,629.
Checking the actual forecast
These figures come from CHANNAHON DRESDEN ISL DAM, IL US, the NOAA station 8.3 miles from Wilmington, 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