In August, Portland typically sees daytime highs of 25.0°C and overnight lows around 14.4°C. Compared to the annual average high of 12.6°C, August runs +12.5°C.
August in Portland averages a daytime high of 25.0°C and an overnight low of 14.4°C.
August runs +12.5°C compared to Portland's annual average high of 12.6°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 25.0°C and cooler evenings around 14.4°C.