Weather history and climate summary information is available for the following locations:
- Boston
- Chicopee Falls
- Nantucket
Warmest May Days
The warmest May days in Massachusetts are:
| Chicopee Falls, Massachusetts | 1964 | 101.3°F |
| Chicopee Falls, Massachusetts | 2010 | 97.2°F |
| Chicopee Falls, Massachusetts | 1992 | 96.1°F |
| Boston, Massachusetts | 1979 | 95°F |
| Chicopee Falls, Massachusetts | 1979 | 93.9°F |
Coldest May Days
The coldest May days in Massachusetts were:
| Chicopee Falls, Massachusetts | 2008 | 24.8°F |
| Chicopee Falls, Massachusetts | 1966 | 25.3°F |
| Chicopee Falls, Massachusetts | 1968 | 25.3°F |
| Chicopee Falls, Massachusetts | 1974 | 26.2°F |
| Chicopee Falls, Massachusetts | 2010 | 26.2°F |
Wettest May Days
The wettest single days in May occurred:
| Boston, Massachusetts | 2006 | 4.4 inches |
| Chicopee Falls, Massachusetts | 1984 | 3 inches |
| Boston, Massachusetts | 1977 | 2.5 inches |
| Chicopee Falls, Massachusetts | 1991 | 2.4 inches |
| Chicopee Falls, Massachusetts | 1989 | 2.3 inches |