In August, Fountain Valley 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 +4.3°C.
August in Fountain Valley averages a daytime high of 26.4°C and an overnight low of 16.8°C.
August runs +4.3°C compared to Fountain Valley'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.