Charlton Massachusetts Climate Data

Monthly Average Climate Data for Charlton Massachusetts

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-8.3 °C0.8 °C97.28 mm
February-7.6 °C2.1 °C82.55 mm
March-3.4 °C6.3 °C113.54 mm
April2.4 °C13.2 °C113.03 mm
May8.1 °C19.3 °C93.22 mm
June13.2 °C23.8 °C110.49 mm
July16.3 °C26.7 °C103.12 mm
August15.6 °C25.7 °C111.51 mm
September11.8 °C21.9 °C109.98 mm
October5.4 °C15.3 °C128.27 mm
November0.2 °C9.3 °C97.54 mm
December-4.7 °C3.6 °C116.08 mm
Annual4.1 °C14 °C1276.61 mm

Climate Data for Charlton Massachusetts

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 11 - May 20
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 6b : -20.6°C to -17.8°C
Plant Hardiness Zone - 2012Zone 6a : -23.3°C to -20.6°C
Current Drought ConditionsSevere Drought
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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