In October, Niihama typically sees daytime highs of 19.3°C and overnight lows around 11.4°C. Compared to the annual average high of 17.0°C, October runs +2.3°C.
October in Niihama averages a daytime high of 19.3°C and an overnight low of 11.4°C.
October runs +2.3°C compared to Niihama's annual average high of 17.0°C, ranking #6 of 12 months by warmth.
Plan for daytime highs near 19.3°C and cooler evenings around 11.4°C.