In September, Yashio-shi typically sees daytime highs of 26.8°C and overnight lows around 19.8°C. Compared to the annual average high of 19.6°C, September runs +7.2°C.
September in Yashio-shi averages a daytime high of 26.8°C and an overnight low of 19.8°C.
September runs +7.2°C compared to Yashio-shi's annual average high of 19.6°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 26.8°C and cooler evenings around 19.8°C.