In May, Oshawa typically sees daytime highs of 16.9°C and overnight lows around 6.6°C. Compared to the annual average high of 11.9°C, May runs +5.1°C.
May in Oshawa averages a daytime high of 16.9°C and an overnight low of 6.6°C.
May runs +5.1°C compared to Oshawa's annual average high of 11.9°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 16.9°C and cooler evenings around 6.6°C.