In September, Tosu typically sees daytime highs of 27.9°C and overnight lows around 18.8°C. Compared to the annual average high of 20.2°C, September runs +7.7°C.
September in Tosu averages a daytime high of 27.9°C and an overnight low of 18.8°C.
September runs +7.7°C compared to Tosu's annual average high of 20.2°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 27.9°C and cooler evenings around 18.8°C.