In August, Renton typically sees daytime highs of 23.9°C and overnight lows around 12.0°C. Compared to the annual average high of 15.2°C, August runs +8.7°C.
August in Renton averages a daytime high of 23.9°C and an overnight low of 12.0°C.
August runs +8.7°C compared to Renton's annual average high of 15.2°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 23.9°C and cooler evenings around 12.0°C.