Herndon Pennsylvania Climate Data

Monthly Average Climate Data for Herndon Pennsylvania

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January19.5 °F35.9 °F3.06 in.
February20.7 °F38.9 °F2.41 in.
March28.2 °F48.1 °F3.38 in.
April38.4 °F61.1 °F3.81 in.
May48.7 °F71.4 °F3.89 in.
June58.1 °F79.8 °F4.31 in.
July62.1 °F84.3 °F4.4 in.
August60.5 °F82.4 °F4.03 in.
September53.1 °F75.7 °F4.64 in.
October41.9 °F63.5 °F4.04 in.
November32.3 °F51.6 °F3.15 in.
December25.1 °F40.5 °F3.36 in.
Annual40.7 °F61.1 °F44.48 in.

Climate Data for Herndon Pennsylvania

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateMay 1 - May 10
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 6b : -5°F to 0°F
Plant Hardiness Zone - 2012Zone 6b : -5°F to 0°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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