December in Worcester averages a daily high of 3.3°C with nights around -4.1°C. Expect roughly 11.9 wet days totalling 110.5mm. A hard month to visit for comfort alone.
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 December data.