Portsmouth Ohio Climate Data

Monthly Average Climate Data for Portsmouth Ohio

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-5 °C5.3 °C86.61 mm
February-4.1 °C7.5 °C75.18 mm
March-0.3 °C12.8 °C99.31 mm
April5.1 °C19.8 °C98.3 mm
May10.8 °C24.4 °C111.25 mm
June15.8 °C28.6 °C105.16 mm
July17.8 °C30.3 °C105.66 mm
August16.9 °C30.1 °C78.74 mm
September12.8 °C26.9 °C81.03 mm
October6.3 °C20.7 °C72.39 mm
November0.4 °C13.4 °C63.5 mm
December-2.6 °C7.5 °C82.55 mm
Annual6.2 °C18.9 °C1059.68 mm

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 : -17.8°C to -15°C
Plant Hardiness Zone - 2012Zone 6b : -20.6°C to -17.8°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationCfa - Humid Subtropical Climate
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