April in Peoria averages a daily high of 17.4°C with nights around 5.5°C. Expect roughly 11.5 wet days totalling 104.6mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Peoria is September.
Based on GENERAL WAYNE A. DOWNING INTERNATIONAL AIRPORT, IL US (8.5km), 1995–2024. 30 years of April data.