June in Somerville averages a daily high of 24.6°C with nights around 15.6°C. Expect roughly 11.1 wet days totalling 100.8mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Somerville is May–September.
Based on BOSTON LOGAN INTERNATIONAL AIRPORT, MA US (8km), 1995–2024. 30 years of June data.