Search flights, hotels & activities for Illinois
Compare flights, hotels, cars, and activities in one place.
500+airlines & travel sites compared
21,000+routes tracked
€0booking fees from us
Freeprice drop alerts
Things to Do in Illinois in Summer
Real historical weather for Illinois in Summer: average highs of 30°C and lows of 20°C, with around 94mm of rain (averaged over the last 2 years).
30°C
Average high
20°C
Average low
94mm
Typical rainfall
Real things to do in Illinois in Summer
Ad
Ad
Ad
Ad
Ad
Ad
Ad
Ad
Ad
Ad
Illinois Holocaust Museum Experience360 Admission
★ 5.0(26 reviews)· 2 hrs
From €11
Skip the Line: Public Tour-Adult Admission Ticket (50 mins)
★ 4.9(15 reviews)· 50 min
From €18
Chicago's Ultimate City Bike Tour of Top Downtown Attractions
★ 4.9(254 reviews)· 3 hrs
From €53
Chicago Family Food and Bike Tour with Top Attractions
★ 4.8(99 reviews)· 4 hrs
From €71
Museum of Illusions Chicago Admission Ticket
★ 4.8(5 reviews)· 1h 30m
From €38
Chicago Lake and River Architecture Tour
★ 4.7(2,376 reviews)· 1h 30m
From €40
Frank Lloyd Wright's Home & Studio Tour Ticket
★ 4.7(147 reviews)· 1 hr
From €24
Lake Michigan Sunset Cruise in Chicago
★ 4.5(1,624 reviews)· 1h 30m
From €40
Chicago Water Taxi River Fireworks Cruise
★ 4.5(12 reviews)· 45 min
From €22
Lake Michigan Fireworks Cruise in Chicago
★ 4.2(131 reviews)· 3 hrs
From €49
Real listings from Viator, including live ratings and prices — clicking through takes you to book directly.
Other seasons in Illinois
Plan the rest of your trip
Continue planning your trip to Illinois
Same destination, real availability — no need to search again.
FAQs — Illinois in Summer
Based on real historical data (averaged over the last 2 years), expect highs around 30°C and lows around 20°C, with roughly 94mm of rain.