Rockville Connecticut Climate Data

Monthly Average Climate Data for Rockville Connecticut

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-8.3 °C1.7 °C86.11 mm
February-7.6 °C3.1 °C75.69 mm
March-3.2 °C7.5 °C105.16 mm
April2.6 °C14.4 °C101.35 mm
May8.1 °C20.4 °C91.95 mm
June13.3 °C25.1 °C108.71 mm
July16.3 °C27.9 °C103.12 mm
August15.4 °C27.1 °C106.68 mm
September11.3 °C23.3 °C112.01 mm
October4.9 °C16.7 °C119.89 mm
November-0.3 °C10.4 °C93.22 mm
December-4.7 °C4.8 °C108.71 mm
Annual4 °C15.2 °C1212.6 mm

Climate Data for Rockville Connecticut

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 11 - May 20
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 6b : -20.6°C to -17.8°C
Plant Hardiness Zone - 2012Zone 6a : -23.3°C to -20.6°C
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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