In August, Osan typically sees daytime highs of 29.5°C and overnight lows around 21.1°C. Compared to the annual average high of 16.5°C, August runs +13.0°C.
August in Osan averages a daytime high of 29.5°C and an overnight low of 21.1°C.
August runs +13.0°C compared to Osan's annual average high of 16.5°C, ranking #1 of 12 months by warmth.
Plan for daytime highs near 29.5°C and cooler evenings around 21.1°C.