New London Connecticut Climate Data

Monthly Average Climate Data for New London Connecticut

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January22.0 °F38.3 °F3.8 in.
February23.5 °F40.1 °F3.24 in.
March30.1 °F46.4 °F4.77 in.
April39.6 °F56.3 °F4.49 in.
May48.7 °F65.6 °F3.67 in.
June58.2 °F74.7 °F3.84 in.
July64.7 °F80.2 °F3.17 in.
August63.6 °F79.2 °F3.82 in.
September56.6 °F73.5 °F4.13 in.
October46.4 °F63.0 °F4.59 in.
November36.7 °F53.1 °F3.87 in.
December28.3 °F44.0 °F4.65 in.
Annual43.2 °F59.5 °F48.04 in.

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 : 0°F to 5°F
Plant Hardiness Zone - 2012Zone 6b : -5°F to 0°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year