In September, Hekinan typically sees daytime highs of 27.3°C and overnight lows around 20.3°C. Compared to the annual average high of 19.7°C, September runs +7.6°C.
September in Hekinan averages a daytime high of 27.3°C and an overnight low of 20.3°C.
September runs +7.6°C compared to Hekinan'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 20.3°C.