In August, Guelph typically sees daytime highs of 24.6°C and overnight lows around 12.5°C. Compared to the annual average high of 11.3°C, August runs +13.3°C.
August in Guelph averages a daytime high of 24.6°C and an overnight low of 12.5°C.
August runs +13.3°C compared to Guelph's annual average high of 11.3°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 24.6°C and cooler evenings around 12.5°C.