Norwalk Connecticut Climate Data

Monthly Average Climate Data for Norwalk Connecticut

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January23.2 °F38.9 °F3.97 in.
February24.4 °F40.7 °F2.91 in.
March31.1 °F47.8 °F4.12 in.
April41.1 °F59.4 °F3.92 in.
May50.6 °F69.4 °F3.71 in.
June60.2 °F78.3 °F4.99 in.
July66.1 °F83.7 °F3.68 in.
August65.1 °F82.2 °F4.18 in.
September58.0 °F76.1 °F4.71 in.
October47.1 °F64.6 °F4.35 in.
November37.4 °F53.8 °F4.0 in.
December29.5 °F44.2 °F4.57 in.
Annual44.5 °F61.6 °F49.11 in.

Climate Data for Norwalk Connecticut

Average First Frost DateNov. 1 - Nov. 10
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost75-100 Days
Plant Hardiness Zone - 2023Zone 7a : 0°F to 5°F
Plant Hardiness Zone - 2012Zone 7a : 0°F to 5°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation