June in Champaign averages a daily high of 28.3°C with nights around 16.6°C. Expect roughly 11.1 wet days totalling 117.8mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Champaign is September.
Based on CHAMPAIGN 3 S, IL US (3.6km), 1995–2024. 30 years of June data.