Norwich Connecticut Climate Data

Monthly Average Climate Data for Norwich Connecticut

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-6.2 °C3.6 °C96.52 mm
February-5.2 °C5.1 °C87.38 mm
March-1.2 °C9.2 °C121.41 mm
April4.2 °C15.8 °C117.35 mm
May9.6 °C21.6 °C89.92 mm
June14.8 °C26.3 °C101.35 mm
July18.3 °C29.2 °C91.19 mm
August17.3 °C28.5 °C111.76 mm
September12.8 °C24.4 °C115.06 mm
October6.7 °C18.2 °C122.17 mm
November1.4 °C12.1 °C103.89 mm
December-2.8 °C6.6 °C121.16 mm
Annual5.8 °C16.7 °C1279.16 mm

Climate Data for Norwich Connecticut

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 1 - May 10
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 6b : -20.6°C to -17.8°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
2024 plantmaps.com