Waukegan, IL Weather & Climate Normals
Waukegan's real weather, in one number
Waukegan, IL scores 48/100 on this site's reading of NOAA's own 30-year normals: strongly seasonal. Comfortable weather is limited to a shorter window; summers, winters, or precipitation swing wide. 5 of the year's 12 months average between 55 and 75°F, the range this site counts as mild.
Waukegan's hottest and coldest months
Waukegan's hottest month is Jul, averaging 72°F; its coldest is Jan, averaging 23°F, a 49.7°F swing across the year, one of the widest gaps in this dataset.
Rain and snow in Waukegan
Rain and snow totals are both unavailable at Waukegan's nearest NOAA station, so neither figure is shown here rather than assumed.
Where Waukegan ranks
Waukegan ranks 2299 of 4876 US cities in this dataset for comfort score, and 29 of 330 within IL. About 88,570 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from WAUKEGAN, IL US, 1.5 miles from Waukegan, not a prediction for any specific day.
More on how this is worked out
Why some cities show no snow or rain figure · What a 30-year climate normal actually is