In August, Koriyama typically sees daytime highs of 29.4°C and overnight lows around 20.9°C. Compared to the annual average high of 17.1°C, August runs +12.3°C.
August in Koriyama averages a daytime high of 29.4°C and an overnight low of 20.9°C.
August runs +12.3°C compared to Koriyama's annual average high of 17.1°C, ranking #1 of 12 months by warmth.
Plan for daytime highs near 29.4°C and cooler evenings around 20.9°C.