Bolton Connecticut Climate Data

Monthly Average Climate Data for Bolton Connecticut

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January17.9 °F34.6 °F3.36 in.
February18.8 °F37.2 °F2.92 in.
March26.1 °F44.8 °F4.22 in.
April36.2 °F56.5 °F3.88 in.
May45.8 °F67.0 °F3.64 in.
June55.2 °F75.4 °F4.09 in.
July60.8 °F80.6 °F4.11 in.
August59.3 °F79.1 °F4.07 in.
September52.4 °F72.4 °F4.27 in.
October41.4 °F60.7 °F4.49 in.
November32.3 °F50.3 °F3.64 in.
December24.6 °F40.4 °F4.19 in.
Annual39.2 °F58.3 °F46.88 in.

Climate Data for Bolton Connecticut

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 11 - May 20
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 6b : -5°F to 0°F
Plant Hardiness Zone - 2012Zone 6a : -10°F to -5°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year