In July, Oshawa typically sees daytime highs of 25.3°C and overnight lows around 14.9°C. Compared to the annual average high of 11.9°C, July runs +13.4°C.
July in Oshawa averages a daytime high of 25.3°C and an overnight low of 14.9°C.
July runs +13.4°C compared to Oshawa's annual average high of 11.9°C, ranking #1 of 12 months by warmth.
Plan for daytime highs near 25.3°C and cooler evenings around 14.9°C.