In August, Portland typically sees daytime highs of 26.6°C and overnight lows around 12.0°C. Compared to the annual average high of 16.7°C, August runs +9.9°C.
August in Portland averages a daytime high of 26.6°C and an overnight low of 12.0°C.
August runs +9.9°C compared to Portland's annual average high of 16.7°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 26.6°C and cooler evenings around 12.0°C.