Dalton Massachusetts Climate Data

Monthly Average Climate Data for Dalton Massachusetts

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-10.9 °C-0.7 °C83.57 mm
February-10.2 °C1.1 °C71.63 mm
March-5.8 °C5.2 °C92.46 mm
April0.3 °C12.8 °C93.22 mm
May6.2 °C19.4 °C90.93 mm
June11.3 °C24 °C120.65 mm
July14.1 °C26.4 °C116.08 mm
August13.4 °C25.3 °C111 mm
September9 °C21.6 °C125.22 mm
October3 °C14.9 °C121.41 mm
November-2.1 °C8.2 °C86.61 mm
December-6.9 °C2.3 °C104.14 mm
Annual1.8 °C13.4 °C1216.92 mm

Climate Data for Dalton Massachusetts

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 21 - May 31
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 5b : -26.1°C to -23.3°C
Plant Hardiness Zone - 2012Zone 5a : -28.9°C to -26.1°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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