In May, Oak Lawn typically sees daytime highs of 21.8°C and overnight lows around 9.5°C. Compared to the annual average high of 15.2°C, May runs +6.6°C.
May in Oak Lawn averages a daytime high of 21.8°C and an overnight low of 9.5°C.
May runs +6.6°C compared to Oak Lawn's annual average high of 15.2°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 21.8°C and cooler evenings around 9.5°C.