Charlton Massachusetts Climate Data

Monthly Average Climate Data for Charlton Massachusetts

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January17.1 °F33.4 °F3.83 in.
February18.3 °F35.8 °F3.25 in.
March25.8 °F43.3 °F4.47 in.
April36.3 °F55.8 °F4.45 in.
May46.5 °F66.7 °F3.67 in.
June55.8 °F74.9 °F4.35 in.
July61.4 °F80.1 °F4.06 in.
August60.0 °F78.3 °F4.39 in.
September53.2 °F71.4 °F4.33 in.
October41.8 °F59.5 °F5.05 in.
November32.3 °F48.7 °F3.84 in.
December23.5 °F38.5 °F4.57 in.
Annual39.3 °F57.2 °F50.26 in.

Climate Data for Charlton Massachusetts

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 21 - May 31
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