In August, Vacaville typically sees daytime highs of 32.2°C and overnight lows around 13.4°C. Compared to the annual average high of 23.0°C, August runs +9.1°C.
August in Vacaville averages a daytime high of 32.2°C and an overnight low of 13.4°C.
August runs +9.1°C compared to Vacaville's annual average high of 23.0°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 32.2°C and cooler evenings around 13.4°C.