Willimantic Connecticut Climate Data

Monthly Average Climate Data for Willimantic Connecticut

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-7.6 °C2.7 °C99.82 mm
February-6.7 °C4.2 °C84.07 mm
March-2.6 °C8.4 °C117.35 mm
April3.1 °C15.3 °C112.78 mm
May8.5 °C21 °C89.15 mm
June13.6 °C25.6 °C103.12 mm
July17 °C28.4 °C101.09 mm
August15.9 °C27.6 °C105.92 mm
September11.7 °C23.8 °C107.44 mm
October5.6 °C17.4 °C124.97 mm
November0.1 °C11.3 °C103.12 mm
December-4.2 °C5.7 °C118.36 mm
Annual4.5 °C16 °C1267.19 mm

Climate Data for Willimantic Connecticut

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 1 - May 10
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 ConditionsAbnormally Dry
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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