Johnston South Carolina Climate Data

Monthly Average Climate Data for Johnston South Carolina

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January33.2 °F55.5 °F4.19 in.
February34.8 °F59.1 °F3.69 in.
March40.9 °F66.6 °F4.42 in.
April49.2 °F75.2 °F3.18 in.
May58.1 °F83.0 °F3.18 in.
June65.6 °F89.3 °F4.62 in.
July69.2 °F92.3 °F4.25 in.
August68.0 °F90.8 °F4.75 in.
September62.8 °F84.9 °F3.9 in.
October50.6 °F76.1 °F3.02 in.
November41.1 °F65.6 °F3.35 in.
December35.9 °F57.6 °F4.16 in.
Annual50.8 °F74.7 °F46.71 in.

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 : 10°F to 15°F
Plant Hardiness Zone - 2012Zone 8a : 10°F to 15°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationCfa - Humid Subtropical Climate