New Haven Connecticut Climate Data

Monthly Average Climate Data for New Haven Connecticut

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January23.2 °F38.2 °F3.78 in.
February24.6 °F40.4 °F3.13 in.
March31.3 °F47.7 °F4.4 in.
April40.9 °F58.1 °F4.19 in.
May50.8 °F68.3 °F3.89 in.
June60.4 °F77.2 °F4.18 in.
July66.5 °F83.1 °F3.57 in.
August65.3 °F81.3 °F3.97 in.
September58.1 °F75.7 °F4.36 in.
October46.9 °F64.1 °F4.85 in.
November37.0 °F53.1 °F3.79 in.
December28.9 °F43.3 °F4.38 in.
Annual44.5 °F60.9 °F48.49 in.

Climate Data for New Haven Connecticut

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost75-100 Days
Plant Hardiness Zone - 2023Zone 7a : 0°F to 5°F
Plant Hardiness Zone - 2012Zone 7a : 0°F to 5°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation