August in Rockford averages a daily high of 28°C with nights around 16.5°C. Expect roughly 9.1 wet days totalling 108.6mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Rockford is August–September.
Based on ROCKFORD GREATER ROCKFORD AIRPORT, IL US (8.7km), 1995–2024. 30 years of August data.