Weather history and climate summary information is available for the following locations:
- Boston
- Chicopee Falls
- Nantucket
Warmest October Days
The warmest October days in Massachusetts are:
| Chicopee Falls, Massachusetts | 1954 | 89.2°F |
| Boston, Massachusetts | 1954 | 89.1°F |
| Boston, Massachusetts | 1963 | 89.1°F |
| Chicopee Falls, Massachusetts | 1941 | 88.3°F |
| Chicopee Falls, Massachusetts | 1963 | 87.3°F |
Coldest October Days
The coldest October days in Massachusetts were:
| Chicopee Falls, Massachusetts | 1972 | 16°F |
| Chicopee Falls, Massachusetts | 1976 | 18.1°F |
| Chicopee Falls, Massachusetts | 1988 | 18.1°F |
| Chicopee Falls, Massachusetts | 1969 | 18.3°F |
| Chicopee Falls, Massachusetts | 1978 | 19.2°F |
Wettest October Days
The wettest single days in October occurred:
| Chicopee Falls, Massachusetts | 2005 | 6.1 inches |
| Boston, Massachusetts | 1990 | 3.9 inches |
| Boston, Massachusetts | 1995 | 3.3 inches |
| Chicopee Falls, Massachusetts | 1995 | 3 inches |
| Nantucket, Massachusetts | 2010 | 2.8 inches |