Average Temperatures and Rainfall for Connecticut

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).

What is the warmest or hottest month in Connecticut?

July is the hottest or warmest month in Connecticut, with an average maximum temperate of 29°C/84°F.

What is the coldest or coolest month in Connecticut?

January is the coolest or coldest month in Connecticut, with an average minimum temperate of -6°C/21°F.

What is the most rainy or wettest month in Connecticut?

October is the wettest or most rainy month in Connecticut, with an average rainfall of 126mm/5 inches.

What is the least rainy or driest month in Connecticut?

January is the driest or least rainy month in Connecticut, with an average rainfall of 80mm/3 inches.

What is the warmest or hottest place in Connecticut?

West Haven is the hottest or warmest place in Connecticut, with an average maximum temperate of 12°C/54°F.

What is the coldest place in Connecticut?

Waterbury is the coldest place in Connecticut, with an average maximum temperate of 9°C/48°F.

What is the most rainy or wettest place in Connecticut?

Waterbury is the most rainy or wettest place in Connecticut, with an average annual rainfall of 1,485mm/58 inches.

What is the least rainy or driest place in Connecticut?

Hamden is the least rainy or driest place in Connecticut, with an average annual rainfall of 1,125mm/44 inches.

Average Monthly Temperatures
Average Maximum Temperature Average Minimum Temperature
Average Monthly Rainfall
PlaceMin TempMax TempAvg TempRainfall
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