At the Greenville-Spartanburg Airport, the average temperature for last month was 84.7 degrees, the weather service said. That shattered the old record of 81.6 degrees set in August 1954, but it also broke the record for the hottest month ever, surpassing July 1993, when the average temperature for the month was 83.2 degrees.
In Columbia, the average temperature last month was 85.9 degrees, breaking the previous August record of 85.1 set in 1900. But this August did not pass Columbia's record for July 1993, when the monthly average temperature was 86.2 degrees, according to the state climate office.
Greenville posted 10 days of 100 or more degrees last month. Columbia had 14 triple-digit days.
In Rock Hill, six days saw temperatures of 100 or higher and the city averaged 83.8 degrees last month.
"This was the warmest August we've ever had," meteorologist John Tomko said.
Mr. Tomko said the turn to September also means an end to the extreme high temperatures.
A ridge of high pressure, which was responsible for the sustained heat, is finally moving out of the way and allowing other weather systems into the area, he said.