October in Dorchester averages a daily high of 17.9°C with nights around 6.5°C. Expect roughly 11.8 wet days totalling 125.3mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Dorchester is May–June.
Based on JAMAICA PLAIN, MA US (4.1km), 1995–2024. 25 years of October data.