Average annual temperatures for Connecticut (11°C/52°F) are slightly below the average for United States (13°C/55°F).
Average annual rainfall for Connecticut (1,271mm/50 inches) is significantly above the average for United States (1,039mm/41 inches).
July is the hottest or warmest month in Connecticut, with an average maximum temperate of 29°C/84°F.
January is the coolest or coldest month in Connecticut, with an average minimum temperate of -6°C/21°F.
October is the wettest or most rainy month in Connecticut, with an average rainfall of 126mm/5 inches.
January is the driest or least rainy month in Connecticut, with an average rainfall of 80mm/3 inches.
West Haven is the hottest or warmest place in Connecticut, with an average maximum temperate of 12°C/54°F.
Waterbury is the coldest place in Connecticut, with an average maximum temperate of 9°C/48°F.
Waterbury is the most rainy or wettest place in Connecticut, with an average annual rainfall of 1,485mm/58 inches.
Hamden is the least rainy or driest place in Connecticut, with an average annual rainfall of 1,125mm/44 inches.
| Place | Min Temp | Max Temp | Avg Temp | Rainfall |
|---|---|---|---|---|
| Bridgeport | 8 | 17 | 12 | 1,269 |
| Bristol | 6 | 17 | 11 | 1,179 |
| City of Milford | 8 | 17 | 12 | 1,269 |
| Danbury | 5 | 16 | 10 | 1,220 |
| East Hartford | 5 | 17 | 11 | 1,352 |
| East Norwalk | 8 | 17 | 12 | 1,269 |
| Fairfield | 8 | 17 | 12 | 1,269 |
| Hamden | 5 | 17 | 11 | 1,125 |
| Hartford | 5 | 17 | 11 | 1,352 |
| Meriden | 6 | 17 | 11 | 1,179 |
| Milford | 8 | 17 | 12 | 1,269 |
| New Britain | 6 | 17 | 11 | 1,179 |
| New Haven | 8 | 17 | 12 | 1,269 |
| North Stamford | 7 | 16 | 12 | 1,297 |
| Norwalk | 8 | 17 | 12 | 1,269 |
| Stamford | 7 | 16 | 12 | 1,297 |
| Stratford | 8 | 17 | 12 | 1,269 |
| Waterbury | 3 | 15 | 9 | 1,485 |
| West Hartford | 5 | 17 | 11 | 1,352 |
| West Haven | 8 | 17 | 12 | 1,269 |