In August, Surprise typically sees daytime highs of 39.5°C and overnight lows around 24.5°C. Compared to the annual average high of 29.7°C, August runs +9.8°C.
August in Surprise averages a daytime high of 39.5°C and an overnight low of 24.5°C.
August runs +9.8°C compared to Surprise's annual average high of 29.7°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 39.5°C and cooler evenings around 24.5°C.