In August, Onomichi typically sees daytime highs of 31.0°C and overnight lows around 24.1°C. Compared to the annual average high of 19.2°C, August runs +11.8°C.
August in Onomichi averages a daytime high of 31.0°C and an overnight low of 24.1°C.
August runs +11.8°C compared to Onomichi's annual average high of 19.2°C, ranking #1 of 12 months by warmth.
Plan for daytime highs near 31.0°C and cooler evenings around 24.1°C.