Union South Carolina Climate Data

Monthly Average Climate Data for Union South Carolina

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-0.7 °C11.9 °C102.87 mm
February0.7 °C14.1 °C91.69 mm
March4 °C18.4 °C108.71 mm
April8.6 °C23.4 °C92.96 mm
May13.8 °C27.3 °C85.6 mm
June18.5 °C30.9 °C108.2 mm
July20.6 °C32.8 °C91.69 mm
August19.9 °C31.8 °C103.38 mm
September16.4 °C28.7 °C95.76 mm
October9.4 °C23.3 °C82.8 mm
November3.4 °C17.6 °C89.41 mm
December0.7 °C13.2 °C105.66 mm
Annual9.6 °C22.8 °C1158.73 mm

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 : -12.2°C to -9.4°C
Plant Hardiness Zone - 2012Zone 7b : -15°C to -12.2°C
Current Drought ConditionsNormal
Köppen Climate ClassificationCfa - Humid Subtropical Climate
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