September in Worcester averages a daily high of 21.7°C with nights around 12.6°C. Expect roughly 9.2 wet days totalling 107.6mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Worcester is June–September.
Based on WORCESTER REGIONAL AIRPORT, MA US (5.9km), 1995–2024. 30 years of September data.