Mercersburg Pennsylvania Climate Data

Monthly Average Climate Data for Mercersburg Pennsylvania

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January22.5 °F40.0 °F3.14 in.
February23.8 °F43.4 °F2.63 in.
March30.9 °F52.0 °F3.91 in.
April41.0 °F64.4 °F4.03 in.
May50.4 °F73.3 °F4.54 in.
June59.4 °F82.2 °F4.5 in.
July64.0 °F87.0 °F3.9 in.
August62.1 °F85.0 °F4.42 in.
September54.9 °F78.2 °F4.22 in.
October43.4 °F66.2 °F4.02 in.
November33.8 °F54.6 °F3.18 in.
December26.6 °F43.7 °F3.48 in.
Annual42.7 °F64.2 °F45.97 in.

Climate Data for Mercersburg Pennsylvania

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 7a : 0°F to 5°F
Plant Hardiness Zone - 2012Zone 6b : -5°F to 0°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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