Jerseyville, IL Weather & Climate Normals
What a normal year in Jerseyville actually looks like
On the 30-year record NOAA keeps for Jerseyville, IL, the comfort score comes out to 47/100, 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 Jerseyville's weather actually swings
Average temperatures in Jerseyville run from 28°F in Jan up to 76°F in Jul, a 48.5°F seasonal swing, one of the widest gaps in this dataset.
How wet Jerseyville actually gets
Over a typical year, Jerseyville sees about 42.22in of precipitation a year across roughly 103 days with measurable rain or snow, with 12.5in of snow a year.
Jerseyville against the rest of the country
Out of 4876 cities scored here, Jerseyville comes in at 2788; within IL alone it ranks 88 of 330. Population is about 8,350.
Checking the actual forecast
These figures come from JERSEYVILLE 2 SW, IL US, the NOAA station 1.3 miles from Jerseyville, 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