Granite City, IL Weather & Climate Normals
What a normal year in Granite City actually looks like
On the 30-year record NOAA keeps for Granite City, 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 Granite City's weather actually swings
Average temperatures in Granite City run from 30°F in Jan up to 78°F in Jul, a 47.9°F seasonal swing, one of the widest gaps in this dataset.
How wet Granite City actually gets
Granite City averages 41.87in of precipitation a year across roughly 99 days with measurable rain or snow; the nearest NOAA station does not record snowfall, so no snow figure is shown rather than guessed.
Granite City against the rest of the country
Out of 4876 cities scored here, Granite City comes in at 2101; within IL alone it ranks 11 of 330. Population is about 26,854.
Checking the actual forecast
These figures come from ALTON - MELVIN PRICE L&D, IL US, the NOAA station 9.6 miles from Granite City, 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