Dalton Massachusetts Climate Data

Monthly Average Climate Data for Dalton Massachusetts

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January12.4 °F30.8 °F3.29 in.
February13.6 °F33.9 °F2.82 in.
March21.6 °F41.4 °F3.64 in.
April32.5 °F55.0 °F3.67 in.
May43.2 °F67.0 °F3.58 in.
June52.4 °F75.2 °F4.75 in.
July57.3 °F79.6 °F4.57 in.
August56.2 °F77.6 °F4.37 in.
September48.2 °F70.8 °F4.93 in.
October37.4 °F58.9 °F4.78 in.
November28.2 °F46.7 °F3.41 in.
December19.6 °F36.2 °F4.1 in.
Annual35.2 °F56.1 °F47.91 in.

Climate Data for Dalton Massachusetts

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 11 - May 20
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 5b : -15°F to -10°F
Plant Hardiness Zone - 2012Zone 5a : -20°F to -15°F
Current Drought ConditionsSevere Drought
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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