In August, National City typically sees daytime highs of 26.4°C and overnight lows around 16.8°C. Compared to the annual average high of 22.1°C, August runs +4.4°C.
August in National City averages a daytime high of 26.4°C and an overnight low of 16.8°C.
August runs +4.4°C compared to National City's annual average high of 22.1°C, ranking #1 of 12 months by warmth.
Plan for daytime highs near 26.4°C and cooler evenings around 16.8°C.