Seymour Connecticut Climate Data

Monthly Average Climate Data for Seymour Connecticut

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January19.4 °F36.6 °F3.96 in.
February20.7 °F39.1 °F3.41 in.
March28.0 °F46.7 °F4.65 in.
April38.2 °F58.3 °F4.37 in.
May48.2 °F69.6 °F4.13 in.
June57.6 °F77.8 °F4.44 in.
July63.2 °F83.3 °F4.14 in.
August61.6 °F81.5 °F4.12 in.
September54.5 °F74.8 °F4.65 in.
October42.7 °F63.1 °F5.06 in.
November33.0 °F51.9 °F4.12 in.
December25.2 °F41.6 °F4.42 in.
Annual41 °F60.4 °F51.47 in.

Climate Data for Seymour 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 6b : -5°F to 0°F
Plant Hardiness Zone - 2012Zone 6b : -5°F to 0°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation