In May, Cheonan typically sees daytime highs of 24.0°C and overnight lows around 11.0°C. Compared to the annual average high of 17.0°C, May runs +7.0°C.
May in Cheonan averages a daytime high of 24.0°C and an overnight low of 11.0°C.
May runs +7.0°C compared to Cheonan's annual average high of 17.0°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 24.0°C and cooler evenings around 11.0°C.