Jefferson Pennsylvania Climate Data

Monthly Average Climate Data for Jefferson Pennsylvania

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-6.1 °C3.6 °C82.04 mm
February-5.4 °C5.2 °C69.85 mm
March-1.6 °C10.4 °C88.39 mm
April3.7 °C17.8 °C87.38 mm
May9.4 °C22.8 °C111.76 mm
June14.4 °C26.8 °C112.01 mm
July16.7 °C28.9 °C115.32 mm
August15.9 °C28.4 °C96.77 mm
September12 °C25.1 °C84.84 mm
October5.6 °C18.4 °C72.9 mm
November0.4 °C11.6 °C76.96 mm
December-3.3 °C5.9 °C81.53 mm
Annual5.1 °C17.1 °C1079.75 mm
MonthAvg. LowAvg. HighAvg. Precip
January-4.9 °C4.2 °C81.53 mm
February-4.2 °C5.8 °C68.33 mm
March-0.3 °C10.7 °C101.6 mm
April5.4 °C17.6 °C89.66 mm
May10.8 °C22.8 °C103.12 mm
June15.9 °C27.4 °C98.04 mm
July18.3 °C29.8 °C110.49 mm
August17.3 °C28.8 °C100.58 mm
September13.6 °C25.2 °C126.24 mm
October7.3 °C18.6 °C102.36 mm
November1.9 °C12.4 °C81.28 mm
December-2.3 °C6.6 °C90.93 mm
Annual6.6 °C17.5 °C1154.16 mm

Climate Data for Jefferson Pennsylvania

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 11 - May 20
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 6b : -20.6°C to -17.8°C
Plant Hardiness Zone - 2012Zone 6b : -20.6°C to -17.8°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateMay 1 - May 10
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 7a : -17.8°C to -15°C
Plant Hardiness Zone - 2012Zone 6b : -20.6°C to -17.8°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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