In June, Niihama typically sees daytime highs of 23.0°C and overnight lows around 16.6°C. Compared to the annual average high of 17.0°C, June runs +5.9°C.
June in Niihama averages a daytime high of 23.0°C and an overnight low of 16.6°C.
June runs +5.9°C compared to Niihama's annual average high of 17.0°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 23.0°C and cooler evenings around 16.6°C.