Royalston Massachusetts Climate Data

Monthly Average Climate Data for Royalston Massachusetts

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January12.5 °F31.1 °F3.71 in.
February13.9 °F34.3 °F3.18 in.
March21.7 °F41.9 °F3.95 in.
April32.9 °F55.3 °F3.78 in.
May43.6 °F67.1 °F3.73 in.
June53.1 °F75.7 °F4.55 in.
July58.6 °F80.9 °F4.35 in.
August56.3 °F79.3 °F4.28 in.
September48.8 °F71.5 °F4.24 in.
October38.0 °F58.6 °F4.97 in.
November28.9 °F46.9 °F3.74 in.
December19.4 °F36.4 °F4.14 in.
Annual35.6 °F56.6 °F48.62 in.

Climate Data for Royalston Massachusetts

Average First Frost DateSep. 21 - Sep. 30
Average Last Frost DateMay 21 - May 31
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 6a : -10°F to -5°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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