In August, Waterloo typically sees daytime highs of 28.0°C and overnight lows around 15.3°C. Compared to the annual average high of 14.4°C, August runs +13.7°C.
August in Waterloo averages a daytime high of 28.0°C and an overnight low of 15.3°C.
August runs +13.7°C compared to Waterloo's annual average high of 14.4°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 28.0°C and cooler evenings around 15.3°C.