Grafton Vermont Climate Data

Monthly Average Climate Data for Grafton Vermont

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-12.5 °C-1.6 °C88.65 mm
February-12.1 °C0.1 °C73.41 mm
March-7.4 °C4.5 °C95.76 mm
April-0.8 °C11.9 °C98.55 mm
May5.7 °C19 °C102.62 mm
June10.8 °C23.6 °C117.6 mm
July13.4 °C26.4 °C108.71 mm
August12.4 °C25.6 °C103.38 mm
September7.9 °C21.7 °C102.87 mm
October1.8 °C14.2 °C130.05 mm
November-3.2 °C7.6 °C97.03 mm
December-8.2 °C1.3 °C106.93 mm
Annual0.7 °C12.9 °C1225.56 mm

Climate Data for Grafton Vermont

Average First Frost DateSep. 21 - Sep. 30
Average Last Frost DateJun. 1 - Jun. 10
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 ConditionsNormal
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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