Royalston Massachusetts Climate Data

Monthly Average Climate Data for Royalston Massachusetts

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-10.8 °C-0.5 °C94.23 mm
February-10.1 °C1.3 °C80.77 mm
March-5.7 °C5.5 °C100.33 mm
April0.5 °C12.9 °C96.01 mm
May6.4 °C19.5 °C94.74 mm
June11.7 °C24.3 °C115.57 mm
July14.8 °C27.2 °C110.49 mm
August13.5 °C26.3 °C108.71 mm
September9.3 °C21.9 °C107.7 mm
October3.3 °C14.8 °C126.24 mm
November-1.7 °C8.3 °C95 mm
December-7 °C2.4 °C105.16 mm
Annual2 °C13.7 °C1234.95 mm

Climate Data for Royalston Massachusetts

Average First Frost DateSep. 21 - Sep. 30
Average Last Frost DateJun. 1 - Jun. 10
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 6a : -23.3°C to -20.6°C
Plant Hardiness Zone - 2012Zone 5b : -26.1°C to -23.3°C
Current Drought ConditionsNormal
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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