Union South Carolina Climate Data

Monthly Average Climate Data for Union South Carolina

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January30.8 °F53.5 °F4.05 in.
February33.2 °F57.3 °F3.61 in.
March39.2 °F65.1 °F4.28 in.
April47.5 °F74.2 °F3.66 in.
May56.9 °F81.1 °F3.37 in.
June65.3 °F87.7 °F4.26 in.
July69.0 °F91.1 °F3.61 in.
August67.8 °F89.2 °F4.07 in.
September61.6 °F83.7 °F3.77 in.
October49.0 °F74.0 °F3.26 in.
November38.2 °F63.7 °F3.52 in.
December33.3 °F55.8 °F4.16 in.
Annual49.3 °F73 °F45.62 in.

Climate Data for Union South Carolina

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost50-75 Days
Plant Hardiness Zone - 2023Zone 8a : 10°F to 15°F
Plant Hardiness Zone - 2012Zone 7b : 5°F to 10°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationCfa - Humid Subtropical Climate
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