New Haven Connecticut Climate Data

Monthly Average Climate Data for New Haven Connecticut

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-4.9 °C3.4 °C96.01 mm
February-4.1 °C4.7 °C79.5 mm
March-0.4 °C8.7 °C111.76 mm
April4.9 °C14.5 °C106.43 mm
May10.4 °C20.2 °C98.81 mm
June15.8 °C25.1 °C106.17 mm
July19.2 °C28.4 °C90.68 mm
August18.5 °C27.4 °C100.84 mm
September14.5 °C24.3 °C110.74 mm
October8.3 °C17.8 °C123.19 mm
November2.8 °C11.7 °C96.27 mm
December-1.7 °C6.3 °C111.25 mm
Annual6.9 °C16 °C1231.65 mm

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 : -17.8°C to -15°C
Plant Hardiness Zone - 2012Zone 7a : -17.8°C to -15°C
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation