...and more
Fly from
Fly to
Route
Depart
Return
Price
BelfastChicago
BFS - ORD
BFSORD
Belfast Intl
Sat 12/7
6:00 am-8:24 am
2 stops32h 24m
Chicago O'Hare Intl
Wed 12/11
5:00 pm-12:50 pm
1 stop13h 50m
In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.
If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).