Wilton Connecticut Climate Data

Monthly Average Climate Data for Wilton Connecticut

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January19.9 °F36.9 °F3.95 in.
February21.5 °F39.6 °F3.05 in.
March28.7 °F47.2 °F4.23 in.
April39.1 °F60.0 °F4.07 in.
May48.8 °F70.4 °F3.86 in.
June58.3 °F78.7 °F4.7 in.
July63.6 °F83.7 °F4.04 in.
August62.3 °F81.7 °F4.69 in.
September55.1 °F74.9 °F4.77 in.
October43.5 °F63.4 °F4.65 in.
November34.0 °F52.3 °F4.15 in.
December26.0 °F41.8 °F4.5 in.
Annual41.7 °F60.9 °F50.66 in.

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 : 0°F to 5°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
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