Best time to travel to Illinois

Discover the ideal time to visit Illinois

Planning a trip to Illinois? Based on weather conditions, the best time to visit is during July, August and September, see the table bellow for more details.

On this page, you will find detailed climate data, graphs, and insights about Illinois to help you plan your trip and choose the most optimal time to visit.

Illinois Monthly Climate Overview

Click on a month for in-depth weather statistics and trends

Month	Temperatures	Total Rain	Total Snow	Rainy Days	Snow Days	Dry Days
January	-1°/-5°	56 mm	15 cm	4 days	6 days	21 days
February	2°/-4°	57 mm	15 cm	3 days	3 days	22 days
March	8°/1°	144 mm	8 cm	9 days	3 days	19 days
April	12°/5°	185 mm	2 cm	11 days	1 days	18 days
May	17°/10°	133 mm	0 cm	12 days	0 days	19 days
June	23°/17°	191 mm	0 cm	11 days	0 days	19 days
July	26°/20°	149 mm	0 cm	12 days	0 days	19 days
August	26°/20°	152 mm	0 cm	12 days	0 days	19 days
September	23°/17°	91 mm	0 cm	7 days	0 days	23 days
October	17°/11°	114 mm	0 cm	9 days	0 days	22 days
November	9°/4°	102 mm	6 cm	6 days	1 days	23 days
December	3°/-1°	82 mm	12 cm	7 days	2 days	22 days