March in Dorchester averages a daily high of 8.5°C with nights around -1.5°C. Expect roughly 10.1 wet days totalling 123.3mm. Demanding conditions — pack for it and plan indoor options.
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 March data.