In July, St. Catharines typically sees daytime highs of 26.3°C and overnight lows around 16.6°C. Compared to the annual average high of 12.9°C, July runs +13.4°C.
July in St. Catharines averages a daytime high of 26.3°C and an overnight low of 16.6°C.
July runs +13.4°C compared to St. Catharines's annual average high of 12.9°C, ranking #1 of 12 months by warmth.
Plan for daytime highs near 26.3°C and cooler evenings around 16.6°C.