January in Peoria averages a daily high of 0.7°C with nights around -7.8°C. Expect roughly 10 wet days totalling 53.8mm. A hard month to visit for comfort alone.
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 January data.