Hartford Connecticut Climate Data

Monthly Average Climate Data for Hartford Connecticut

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January19.4 °F36.1 °F3.74 in.
February20.7 °F38.8 °F3.28 in.
March28.4 °F46.9 °F4.35 in.
April38.9 °F59.5 °F4.21 in.
May49.2 °F70.3 °F3.69 in.
June58.6 °F78.8 °F4.75 in.
July64.0 °F84.2 °F4.21 in.
August62.4 °F82.7 °F4.28 in.
September54.8 °F75.5 °F4.69 in.
October43.3 °F63.3 °F5.15 in.
November33.5 °F51.7 °F3.83 in.
December25.5 °F41.6 °F4.51 in.
Annual41.6 °F60.8 °F50.69 in.

Climate Data for Hartford Connecticut

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 1 - May 10
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 6b : -5°F to 0°F
Plant Hardiness Zone - 2012Zone 6b : -5°F to 0°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
2024 plantmaps.com