In July, Nagaoka typically sees daytime highs of 29.3°C and overnight lows around 20.4°C. Compared to the annual average high of 17.7°C, July runs +11.6°C.
July in Nagaoka averages a daytime high of 29.3°C and an overnight low of 20.4°C.
July runs +11.6°C compared to Nagaoka's annual average high of 17.7°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 29.3°C and cooler evenings around 20.4°C.