Bolton Connecticut Climate Data

Monthly Average Climate Data for Bolton Connecticut

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-7.8 °C1.4 °C85.34 mm
February-7.3 °C2.9 °C74.17 mm
March-3.3 °C7.1 °C107.19 mm
April2.3 °C13.6 °C98.55 mm
May7.7 °C19.4 °C92.46 mm
June12.9 °C24.1 °C103.89 mm
July16 °C27 °C104.39 mm
August15.2 °C26.2 °C103.38 mm
September11.3 °C22.4 °C108.46 mm
October5.2 °C15.9 °C114.05 mm
November0.2 °C10.2 °C92.46 mm
December-4.1 °C4.7 °C106.43 mm
Annual4 °C14.6 °C1190.77 mm

Climate Data for Bolton 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 ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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