In August, Joetsu typically sees daytime highs of 29.7°C and overnight lows around 20.9°C. Compared to the annual average high of 17.1°C, August runs +12.5°C.
August in Joetsu averages a daytime high of 29.7°C and an overnight low of 20.9°C.
August runs +12.5°C compared to Joetsu's annual average high of 17.1°C, ranking #1 of 12 months by warmth.
Plan for daytime highs near 29.7°C and cooler evenings around 20.9°C.