In September, Katori-shi typically sees daytime highs of 26.0°C and overnight lows around 19.4°C. Compared to the annual average high of 18.8°C, September runs +7.2°C.
September in Katori-shi averages a daytime high of 26.0°C and an overnight low of 19.4°C.
September runs +7.2°C compared to Katori-shi's annual average high of 18.8°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 26.0°C and cooler evenings around 19.4°C.