In September, Yonezawa typically sees daytime highs of 23.8°C and overnight lows around 15.1°C. Compared to the annual average high of 15.4°C, September runs +8.5°C.
September in Yonezawa averages a daytime high of 23.8°C and an overnight low of 15.1°C.
September runs +8.5°C compared to Yonezawa's annual average high of 15.4°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 23.8°C and cooler evenings around 15.1°C.