In October, Osan typically sees daytime highs of 19.2°C and overnight lows around 6.7°C. Compared to the annual average high of 16.5°C, October runs +2.7°C.
October in Osan averages a daytime high of 19.2°C and an overnight low of 6.7°C.
October runs +2.7°C compared to Osan's annual average high of 16.5°C, ranking #6 of 12 months by warmth.
Plan for daytime highs near 19.2°C and cooler evenings around 6.7°C.