Massachusetts weather in May
May is one of the best months to visit Massachusetts: highs of 19°C (66°F) and about 95 mm (3.7 in) of rain on average. Nights average 8°C (47°F) and cloud cover 64% (NASA POWER, 2001–2025 averages). It is the 6th driest month of the year and the 5th warmest. Compared with April, it is warmer and about as wet; June brings highs of 24°C (74°F) and 113 mm (4.4 in) of rain.
Figures are long-term averages for Boston, the largest city in Massachusetts. See below for other places.
Is May a good time to visit Massachusetts?
best month Weather score 67/100.
Yes. May is one of the best months for weather in Massachusetts.
Does it rain a lot in Massachusetts in May?
Some rain is normal: about 95 mm (3.7 in) falls in an average May. It is the 6th driest month of the year.
How warm is Massachusetts in May?
Days average 19°C (66°F) and nights 8°C (47°F).
Massachusetts weather by month
| Month | High | Low | Rain | Cloud | Weather |
|---|---|---|---|---|---|
| January | 1°C (33°F) | -8°C (18°F) | 80 mm | 62% | least pleasant |
| February | 2°C (35°F) | -7°C (20°F) | 86 mm | 61% | least pleasant |
| March | 6°C (42°F) | -3°C (26°F) | 110 mm | 61% | least pleasant |
| April | 13°C (55°F) | 2°C (36°F) | 107 mm | 61% | fair |
| May | 19°C (66°F) | 8°C (47°F) | 95 mm | 64% | best |
| June | 24°C (74°F) | 14°C (56°F) | 113 mm | 62% | best |
| July | 28°C (82°F) | 17°C (63°F) | 94 mm | 55% | best |
| August | 27°C (81°F) | 17°C (62°F) | 93 mm | 53% | best |
| September | 24°C (75°F) | 13°C (55°F) | 92 mm | 51% | best |
| October | 16°C (61°F) | 7°C (44°F) | 123 mm | 59% | fair |
| November | 10°C (49°F) | 1°C (34°F) | 98 mm | 60% | least pleasant |
| December | 4°C (39°F) | -4°C (26°F) | 116 mm | 63% | least pleasant |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis). Page updated . How we rate months
Weather across Massachusetts in May
Weather can differ a lot within Massachusetts: coasts, hills and mountains each have their own climate.
| Place | High | Low | Rain | Weather |
|---|---|---|---|---|
| Boston | 19°C (66°F) | 8°C (47°F) | 95 mm | best |
| South Boston | 19°C (66°F) | 8°C (47°F) | 95 mm | best |
| Worcester | 19°C (67°F) | 8°C (46°F) | 92 mm | best |
| Springfield | 20°C (68°F) | 8°C (47°F) | 93 mm | best |
| Lowell | 19°C (66°F) | 8°C (47°F) | 95 mm | best |
| Cambridge | 19°C (66°F) | 8°C (47°F) | 95 mm | best |
| New Bedford | 14°C (58°F) | 10°C (50°F) | 86 mm | fair |
| Dorchester | 19°C (66°F) | 8°C (47°F) | 95 mm | best |
| Brockton | 19°C (66°F) | 8°C (47°F) | 90 mm | best |
| Fall River | 17°C (62°F) | 9°C (49°F) | 87 mm | best |
| Quincy | 19°C (66°F) | 8°C (47°F) | 95 mm | best |
| Lynn | 19°C (66°F) | 8°C (47°F) | 95 mm | best |