Hartland Connecticut Climate Data

Monthly Average Climate Data for Hartland Connecticut

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-9.1 °C1.1 °C93.22 mm
February-8.4 °C2.8 °C81.03 mm
March-3.8 °C7.3 °C99.31 mm
April2.1 °C14.8 °C93.98 mm
May7.9 °C20.9 °C107.7 mm
June13.2 °C25.6 °C122.94 mm
July16 °C28.3 °C116.59 mm
August14.9 °C27.3 °C105.66 mm
September10.8 °C23.3 °C125.73 mm
October4.6 °C16.6 °C131.57 mm
November-0.7 °C9.9 °C97.03 mm
December-5.3 °C4 °C107.19 mm
Annual3.5 °C15.2 °C1281.95 mm

Climate Data for Hartland 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 : -23.3°C to -20.6°C
Plant Hardiness Zone - 2012Zone 5b : -26.1°C to -23.3°C
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
2024 plantmaps.com