In May, Oakville typically sees daytime highs of 18.4°C and overnight lows around 6.8°C. Compared to the annual average high of 13.2°C, May runs +5.2°C.
May in Oakville averages a daytime high of 18.4°C and an overnight low of 6.8°C.
May runs +5.2°C compared to Oakville's annual average high of 13.2°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 18.4°C and cooler evenings around 6.8°C.