Cromwell Connecticut Climate Data

Monthly Average Climate Data for Cromwell Connecticut

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-6.9 °C2.4 °C95.76 mm
February-6.2 °C3.8 °C83.31 mm
March-2 °C8.2 °C112.01 mm
April3.6 °C15.2 °C106.43 mm
May9.2 °C21.2 °C96.27 mm
June14.4 °C25.9 °C123.44 mm
July17.5 °C29 °C105.92 mm
August16.6 °C28.1 °C105.66 mm
September12.5 °C24 °C113.28 mm
October6.2 °C17.3 °C131.57 mm
November0.8 °C11 °C99.31 mm
December-3.7 °C5.4 °C113.28 mm
Annual5.2 °C16 °C1286.24 mm

Climate Data for Cromwell Connecticut

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 1 - May 10
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 6b : -20.6°C to -17.8°C
Plant Hardiness Zone - 2012Zone 6b : -20.6°C to -17.8°C
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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