In September, Hachioji typically sees daytime highs of 26.2°C and overnight lows around 18.9°C. Compared to the annual average high of 19.2°C, September runs +7.0°C.
September in Hachioji averages a daytime high of 26.2°C and an overnight low of 18.9°C.
September runs +7.0°C compared to Hachioji's annual average high of 19.2°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 26.2°C and cooler evenings around 18.9°C.