Portsmouth Ohio Climate Data

Monthly Average Climate Data for Portsmouth Ohio

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January23.0 °F41.5 °F3.41 in.
February24.7 °F45.5 °F2.96 in.
March31.4 °F55.1 °F3.91 in.
April41.2 °F67.6 °F3.87 in.
May51.5 °F76.0 °F4.38 in.
June60.4 °F83.5 °F4.14 in.
July64.1 °F86.5 °F4.16 in.
August62.5 °F86.2 °F3.1 in.
September55.1 °F80.4 °F3.19 in.
October43.3 °F69.2 °F2.85 in.
November32.7 °F56.1 °F2.5 in.
December27.4 °F45.5 °F3.25 in.
Annual43.1 °F66.1 °F41.72 in.

Climate Data for Portsmouth Ohio

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 : 0°F to 5°F
Plant Hardiness Zone - 2012Zone 6b : -5°F to 0°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationCfa - Humid Subtropical Climate
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