In August, Oshawa typically sees daytime highs of 24.9°C and overnight lows around 14.7°C. Compared to the annual average high of 11.9°C, August runs +13.0°C.
August in Oshawa averages a daytime high of 24.9°C and an overnight low of 14.7°C.
August runs +13.0°C compared to Oshawa's annual average high of 11.9°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 24.9°C and cooler evenings around 14.7°C.