September in Racine averages a daily high of 21.9°C with nights around 14.2°C. Expect roughly 9 wet days totalling 83.7mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Racine is June–September.
Based on RACINE WWTP, WI US (2.6km), 1995–2024. 30 years of September data.