Crystal Lake Connecticut Climate Data

Monthly Average Climate Data for Crystal Lake Connecticut

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January17.0 °F34.3 °F3.4 in.
February17.7 °F36.6 °F3.06 in.
March25.5 °F44.3 °F4.13 in.
April35.5 °F56.9 °F4.1 in.
May45.5 °F67.6 °F3.61 in.
June54.9 °F75.8 °F4.49 in.
July60.6 °F81.0 °F4.04 in.
August58.7 °F79.3 °F4.49 in.
September51.6 °F72.6 °F4.57 in.
October40.3 °F60.9 °F5.01 in.
November31.2 °F49.9 °F3.73 in.
December23.4 °F40.0 °F4.42 in.
Annual38.5 °F58.3 °F49.05 in.

Climate Data for Crystal Lake Connecticut

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 21 - May 31
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 6b : -5°F to 0°F
Plant Hardiness Zone - 2012Zone 6a : -10°F to -5°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year