In May, Rockford typically sees daytime highs of 21.6°C and overnight lows around 8.4°C. Compared to the annual average high of 14.3°C, May runs +7.2°C.
May in Rockford averages a daytime high of 21.6°C and an overnight low of 8.4°C.
May runs +7.2°C compared to Rockford's annual average high of 14.3°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 21.6°C and cooler evenings around 8.4°C.