Grafton Vermont Climate Data

Monthly Average Climate Data for Grafton Vermont

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January9.5 °F29.1 °F3.49 in.
February10.2 °F32.1 °F2.89 in.
March18.6 °F40.1 °F3.77 in.
April30.6 °F53.4 °F3.88 in.
May42.3 °F66.2 °F4.04 in.
June51.4 °F74.5 °F4.63 in.
July56.2 °F79.5 °F4.28 in.
August54.3 °F78.1 °F4.07 in.
September46.3 °F71.0 °F4.05 in.
October35.2 °F57.5 °F5.12 in.
November26.3 °F45.6 °F3.82 in.
December17.3 °F34.3 °F4.21 in.
Annual33.2 °F55.1 °F48.25 in.

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 : -15°F to -10°F
Plant Hardiness Zone - 2012Zone 5a : -20°F to -15°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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