Cromwell Connecticut Climate Data

Monthly Average Climate Data for Cromwell Connecticut

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January19.6 °F36.3 °F3.77 in.
February20.8 °F38.9 °F3.28 in.
March28.4 °F46.8 °F4.41 in.
April38.5 °F59.4 °F4.19 in.
May48.6 °F70.1 °F3.79 in.
June58.0 °F78.7 °F4.86 in.
July63.5 °F84.2 °F4.17 in.
August61.9 °F82.5 °F4.16 in.
September54.5 °F75.2 °F4.46 in.
October43.1 °F63.1 °F5.18 in.
November33.4 °F51.8 °F3.91 in.
December25.4 °F41.7 °F4.46 in.
Annual41.3 °F60.7 °F50.64 in.

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 : -5°F to 0°F
Plant Hardiness Zone - 2012Zone 6b : -5°F to 0°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation