Weather history and climate summary information is available for the following locations:
- Groton CT
- Hartford
- Stratford
- Windsor Locks
Warmest October Days
The warmest October days in Connecticut are:
| Windsor Locks, Connecticut | 1986 | 91°F |
| Windsor Locks, Connecticut | 1975 | 91°F |
| Stratford, Connecticut | 2007 | 89.1°F |
| Windsor Locks, Connecticut | 2007 | 89.1°F |
| Windsor Locks, Connecticut | 2002 | 87.1°F |
Coldest October Days
The coldest October days in Connecticut were:
| Hartford, Connecticut | 1982 | 9.1°F |
| Windsor Locks, Connecticut | 1978 | 16.9°F |
| Windsor Locks, Connecticut | 1974 | 18°F |
| Windsor Locks, Connecticut | 1988 | 21°F |
| Windsor Locks, Connecticut | 2001 | 21.9°F |
Wettest October Days
The wettest single days in October occurred:
| Windsor Locks, Connecticut | 2005 | 5.7 inches |
| Groton CT, Connecticut | 2005 | 5.6 inches |
| Hartford, Connecticut | 2005 | 4.3 inches |
| Windsor Locks, Connecticut | 1979 | 4 inches |
| Stratford, Connecticut | 2006 | 3.4 inches |