New London Connecticut Climate Data

Monthly Average Climate Data for New London Connecticut

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-5.6 °C3.5 °C96.52 mm
February-4.7 °C4.5 °C82.3 mm
March-1.1 °C8 °C121.16 mm
April4.2 °C13.5 °C114.05 mm
May9.3 °C18.7 °C93.22 mm
June14.6 °C23.7 °C97.54 mm
July18.2 °C26.8 °C80.52 mm
August17.6 °C26.2 °C97.03 mm
September13.7 °C23.1 °C104.9 mm
October8 °C17.2 °C116.59 mm
November2.6 °C11.7 °C98.3 mm
December-2.1 °C6.7 °C118.11 mm
Annual6.2 °C15.3 °C1220.24 mm

Climate Data for New London 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 ConditionsAbnormally Dry
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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