In May, Gary typically sees daytime highs of 20.8°C and overnight lows around 9.9°C. Compared to the annual average high of 14.8°C, May runs +6.0°C.
May in Gary averages a daytime high of 20.8°C and an overnight low of 9.9°C.
May runs +6.0°C compared to Gary's annual average high of 14.8°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 20.8°C and cooler evenings around 9.9°C.