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Landrum, SC Weather. The average temperature of Landrum is 55.62Â°F, which is much lower than the South Carolina average temperature of 61.70Â°F and is higher than the national average temperature of 54.45Â°F. Topics: Heating Cost Index Cooling Cost Index Historical Temperature Historical Precipitation Historical Snow Historical Humidity Historical Wind Speed
Summer: This season is very rainy in the South region. The average maximum temperature in this season is about 72.2Â°F /22Â°C in highlands and about 86Â°F/30Â°C in areas closer to the ocean.ummer: In this season, most commonly in January, the average maximum temperature is about 86Â°F/30ÂºC in coast areas and about 77Â°F/25Â°C in highlands. This period is very rainy, but the rain is strong and fast, called âsummer rainâ.