In September, Koga typically sees daytime highs of 27.3°C and overnight lows around 20.4°C. Compared to the annual average high of 19.7°C, September runs +7.6°C.
September in Koga averages a daytime high of 27.3°C and an overnight low of 20.4°C.
September runs +7.6°C compared to Koga's annual average high of 19.7°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 27.3°C and cooler evenings around 20.4°C.