In August, Port Saint Mary typically sees daytime highs of 16.4°C and overnight lows around 11.8°C. Compared to the annual average high of 11.6°C, August runs +4.9°C.
August in Port Saint Mary averages a daytime high of 16.4°C and an overnight low of 11.8°C.
August runs +4.9°C compared to Port Saint Mary's annual average high of 11.6°C, ranking #1 of 12 months by warmth.
Plan for daytime highs near 16.4°C and cooler evenings around 11.8°C.