In August, Charleston typically sees daytime highs of 31.1°C and overnight lows around 22.1°C. Compared to the annual average high of 23.5°C, August runs +7.7°C.
August in Charleston averages a daytime high of 31.1°C and an overnight low of 22.1°C.
August runs +7.7°C compared to Charleston's annual average high of 23.5°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 31.1°C and cooler evenings around 22.1°C.