As summer 2025 settles over Massachusetts, temperatures across the Bay State are steadily rising. This week, daily highs are expected to push well into the upper 80s and 90s (31–37 °C), possibly delivering the five hottest days of the year so far. But where exactly in Massachusetts does the heat hit hardest year-round?
Even though most parts of the state share a generally similar climate, there are certain towns and cities that consistently record warmer annual temperatures than others. Based on long-term climate averages, these four locations stand out as the warmest in their respective regions.
Eastern Massachusetts – Brockton
To find the warmest spot in eastern Massachusetts, look south of Boston into Plymouth County. Brockton consistently tops the charts here, with an average annual high of 62 °F (16.7 °C). While that number reflects a year-round average, this urban hub tends to feel warmer thanks to its inland location and less coastal influence compared to nearby towns.
Cape Cod and the Islands – Edgartown (Martha’s Vineyard)
On Martha’s Vineyard, the charming coastal town of Edgartown boasts the warmest average temperature among the Cape and Islands region. With an annual average of 60 °F (15.6 °C), it benefits from a temperate marine climate and relatively mild winters, helping it edge out nearby coastal communities in terms of year-round warmth.
Central Massachusetts – Westfield
Head just west of Springfield, and you’ll find Westfield, the warmest city in central Massachusetts. Despite its inland setting, Westfield maintains a year-round average high of 61 °F (16.1 °C). Its position in the Connecticut River Valley often contributes to higher summer highs and more stable warm weather patterns.
Western Massachusetts – North Adams
In the Berkshires, the climate tends to run cooler, but North Adams stands out as the warmest town in western Massachusetts. With an annual average temperature of 58 °F (14.4 °C), it’s still cooler compared to the other warm spots on this list, but relatively milder than its neighboring hill towns. Located in northern Berkshire County, it represents the warmest pocket in an otherwise cooler region.
Back on August 2, 1975, New Bedford set the Massachusetts state record for the highest temperature ever recorded: a blazing 107 °F (41.7 °C). With this week’s weather patterns, Massachusetts could be facing some of the hottest days of 2025 yet.
