Jefferson New York Climate Data

Monthly Average Climate Data for Jefferson New York

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-11.4 °C-1.3 °C75.95 mm
February-10.7 °C-0.2 °C61.98 mm
March-6.7 °C4.4 °C89.41 mm
April-0.7 °C12.3 °C93.22 mm
May5.2 °C19.1 °C98.81 mm
June10.4 °C23.3 °C117.35 mm
July12.8 °C25.4 °C114.55 mm
August12.2 °C24.9 °C110.74 mm
September8.4 °C21.3 °C106.17 mm
October2.7 °C14.6 °C114.3 mm
November-2.3 °C7 °C83.82 mm
December-6.8 °C1.5 °C85.6 mm
Annual1.1 °C12.7 °C1151.9 mm

Climate Data for Jefferson New York

Average First Frost DateSep. 21 - Sep. 30
Average Last Frost DateJun. 11 - Jun. 20
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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