Wilton Connecticut Climate Data

Monthly Average Climate Data for Wilton Connecticut

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-6.7 °C2.7 °C100.33 mm
February-5.8 °C4.2 °C77.47 mm
March-1.8 °C8.4 °C107.44 mm
April3.9 °C15.6 °C103.38 mm
May9.3 °C21.3 °C98.04 mm
June14.6 °C25.9 °C119.38 mm
July17.6 °C28.7 °C102.62 mm
August16.8 °C27.6 °C119.13 mm
September12.8 °C23.8 °C121.16 mm
October6.4 °C17.4 °C118.11 mm
November1.1 °C11.3 °C105.41 mm
December-3.3 °C5.4 °C114.3 mm
Annual5.4 °C16 °C1286.77 mm

Climate Data for Wilton Connecticut

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateMay 1 - May 10
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 7a : -17.8°C to -15°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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