Waterbury Connecticut Climate Data

Monthly Average Climate Data for Waterbury Connecticut

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-7.3 °C2.5 °C97.79 mm
February-6.7 °C4 °C84.07 mm
March-2.6 °C8.4 °C116.08 mm
April3 °C15.3 °C106.17 mm
May8.7 °C21.5 °C105.41 mm
June13.8 °C26.1 °C116.08 mm
July16.9 °C29.1 °C114.3 mm
August16 °C28 °C111 mm
September11.9 °C24.2 °C118.36 mm
October5.6 °C17.6 °C136.14 mm
November0.2 °C11.1 °C104.9 mm
December-4.1 °C5.3 °C117.6 mm
Annual4.6 °C16.1 °C1327.9 mm

Climate Data for Waterbury Connecticut

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 11 - May 20
Average Days With Frost100-125 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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