‹ Massachusetts weather by month
Massachusetts weather in May
The state broadly agrees with itself in May: afternoons run 67° in Boston and 65° in Cape Cod, with everywhere else in between.
Based on 2 weather stations. Two stations — Boston and the Cape, where the ocean softens winter and holds spring back; the Berkshires out west run colder than both.
Boston
Highs near 67°, nights around 50°, and 3.3 in of rain in a typical May.
| Place | Highs / lows | Wet days | The short version |
|---|---|---|---|
| Boston | 67° / 50° | 7 | Everything blooms at once and the patios open properly. |
Cape Cod
Highs near 65°, nights around 48°, and 3.4 in of rain in a typical May.
| Place | Highs / lows | Wet days | The short version |
|---|---|---|---|
| Cape Cod | 65° / 48° | 7 | Perfect for walking, still far too cold for swimming. |
Each place above has its own page for the full story — what the month feels like, what to pack, and whether the timing is right.