Norfolk Connecticut Climate Data

Monthly Average Climate Data for Norfolk Connecticut

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January14.0 °F31.7 °F3.87 in.
February15.4 °F34.6 °F3.33 in.
March23.0 °F42.5 °F4.15 in.
April33.7 °F56.3 °F3.9 in.
May44.5 °F67.5 °F4.12 in.
June53.9 °F75.4 °F4.93 in.
July58.9 °F80.2 °F4.77 in.
August57.9 °F78.5 °F4.72 in.
September50.4 °F70.9 °F4.96 in.
October38.9 °F59.0 °F5.25 in.
November29.5 °F47.4 °F4.08 in.
December20.8 °F36.6 °F4.83 in.
Annual36.7 °F56.7 °F52.91 in.

Climate Data for Norfolk Connecticut

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 21 - May 31
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 6a : -10°F to -5°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year