Monticello, IL Weather & Climate Normals
What a normal year in Monticello actually looks like
On the 30-year record NOAA keeps for Monticello, IL, the comfort score comes out to 49/100, 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 Monticello's weather actually swings
Average temperatures in Monticello run from 25°F in Jan up to 73°F in Jul, a 47.6°F seasonal swing, one of the widest gaps in this dataset.
How wet Monticello actually gets
Monticello averages 39.62in of precipitation a year across roughly 135 days with measurable rain or snow; the nearest NOAA station does not record snowfall, so no snow figure is shown rather than guessed.
Monticello against the rest of the country
Out of 4876 cities scored here, Monticello comes in at 2259; within IL alone it ranks 25 of 330. Population is about 6,010.
Checking the actual forecast
These figures come from CHAMPAIGN 9 SW, IL US, the NOAA station 10.7 miles from Monticello, averaged over 30 years, not tomorrow's forecast.
More on how this is worked out
Why some cities show no snow or rain figure · Why this uses the nearest NOAA station