New Castle Pennsylvania Climate Data

Monthly Average Climate Data for New Castle Pennsylvania

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-6.7 °C2.3 °C76.2 mm
February-6.4 °C3.9 °C60.2 mm
March-2.3 °C9.2 °C76.96 mm
April3.1 °C16.7 °C93.47 mm
May8.7 °C22.3 °C98.04 mm
June13.8 °C27.1 °C109.73 mm
July16.1 °C29.2 °C114.55 mm
August15.3 °C28.5 °C93.47 mm
September11.5 °C24.9 °C95 mm
October5.4 °C18.1 °C79.76 mm
November0.5 °C10.9 °C72.64 mm
December-3.6 °C4.9 °C77.72 mm
Annual4.6 °C16.5 °C1047.74 mm

Climate Data for New Castle Pennsylvania

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 21 - May 31
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 6b : -20.6°C to -17.8°C
Plant Hardiness Zone - 2012Zone 6a : -23.3°C to -20.6°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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