Johnston South Carolina Climate Data

Monthly Average Climate Data for Johnston South Carolina

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January0.7 °C13.1 °C106.43 mm
February1.6 °C15.1 °C93.73 mm
March4.9 °C19.2 °C112.27 mm
April9.6 °C24 °C80.77 mm
May14.5 °C28.3 °C80.77 mm
June18.7 °C31.8 °C117.35 mm
July20.7 °C33.5 °C107.95 mm
August20 °C32.7 °C120.65 mm
September17.1 °C29.4 °C99.06 mm
October10.3 °C24.5 °C76.71 mm
November5.1 °C18.7 °C85.09 mm
December2.2 °C14.2 °C105.66 mm
Annual10.5 °C23.7 °C1186.44 mm

Climate Data for Johnston South Carolina

Average First Frost DateNov. 1 - Nov. 10
Average Last Frost DateApr. 11 - Apr. 20
Average Days With Frost50-75 Days
Plant Hardiness Zone - 2023Zone 8a : -12.2°C to -9.4°C
Plant Hardiness Zone - 2012Zone 8a : -12.2°C to -9.4°C
Current Drought ConditionsNormal
Köppen Climate ClassificationCfa - Humid Subtropical Climate
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