Statistically, the warmest month is July. The central and western parts of Massachusetts can be more humid than the coastline, which is cooled by the breezes off the Atlantic Ocean. Summer thundershowers are dramatic and short in duration. The nights are comfortable with temperatures in the 60s and 70s. The summer months of June, July, and August are the warmest with typical temperatures averaging in the 80s. Spring is a popular time of year to explore the state. Spring temperatures range from 60 to 70 degrees during the day and can dip into the 30s in the evening. Maple syrup flows in March and flowers burst into bloom in May and June. Each season from balmy spring afternoons, sunny summer days, to crisp autumn nights, and winter’s snowy charm, offers visitors new experiences every few months! The Gateway to New England - Cosmopolitan and Friendly Boston. Massachusetts, New England’s most populous state, has four distinct seasons.