April in Champaign averages a daily high of 17.5°C with nights around 5.1°C. Expect roughly 11.7 wet days totalling 95.1mm. 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 April data.