In May, Lake Forest typically sees daytime highs of 22.6°C and overnight lows around 11.0°C. Compared to the annual average high of 23.2°C, May runs -0.6°C.
May in Lake Forest averages a daytime high of 22.6°C and an overnight low of 11.0°C.
May runs -0.6°C compared to Lake Forest's annual average high of 23.2°C, ranking #6 of 12 months by warmth.
Plan for daytime highs near 22.6°C and cooler evenings around 11.0°C.