In September, Ashiya typically sees daytime highs of 28.0°C and overnight lows around 21.0°C. Compared to the annual average high of 20.1°C, September runs +8.0°C.
September in Ashiya averages a daytime high of 28.0°C and an overnight low of 21.0°C.
September runs +8.0°C compared to Ashiya's annual average high of 20.1°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 28.0°C and cooler evenings around 21.0°C.