Weather history and climate summary information is available for the following locations:
- Groton CT
- Hartford
- Stratford
- Windsor Locks
Warmest April Days
The warmest April days in Connecticut are:
| Windsor Locks, Connecticut | 1976 | 96.1°F |
| Windsor Locks, Connecticut | 2002 | 95°F |
| Windsor Locks, Connecticut | 2009 | 93.9°F |
| Hartford, Connecticut | 2010 | 93°F |
| Windsor Locks, Connecticut | 2010 | 93°F |
Coldest April Days
The coldest April days in Connecticut were:
| Windsor Locks, Connecticut | 1982 | 16°F |
| Windsor Locks, Connecticut | 1995 | 19°F |
| Stratford, Connecticut | 1982 | 19.2°F |
| Groton CT, Connecticut | 1982 | 19.2°F |
| Hartford, Connecticut | 1995 | 19.9°F |
Wettest April Days
The wettest single days in April occurred:
| Windsor Locks, Connecticut | 1973 | 7.5 inches |
| Windsor Locks, Connecticut | 2007 | 3.7 inches |
| Stratford, Connecticut | 2006 | 3.6 inches |
| Stratford, Connecticut | 1980 | 3.3 inches |
| Stratford, Connecticut | 2007 | 3.1 inches |