New Castle Pennsylvania Climate Data

Monthly Average Climate Data for New Castle Pennsylvania

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January19.9 °F36.1 °F3.0 in.
February20.4 °F39.1 °F2.37 in.
March27.8 °F48.5 °F3.03 in.
April37.5 °F62.0 °F3.68 in.
May47.7 °F72.2 °F3.86 in.
June56.8 °F80.7 °F4.32 in.
July61.0 °F84.5 °F4.51 in.
August59.5 °F83.3 °F3.68 in.
September52.7 °F76.9 °F3.74 in.
October41.8 °F64.5 °F3.14 in.
November32.9 °F51.7 °F2.86 in.
December25.6 °F40.9 °F3.06 in.
Annual40.3 °F61.7 °F41.25 in.

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 : -5°F to 0°F
Plant Hardiness Zone - 2012Zone 6a : -10°F to -5°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation