In May, Rosario typically sees daytime highs of 20.3°C and overnight lows around 8.7°C. Compared to the annual average high of 23.7°C, May runs -3.4°C.
May in Rosario averages a daytime high of 20.3°C and an overnight low of 8.7°C.
May runs -3.4°C compared to Rosario's annual average high of 23.7°C, ranking #9 of 12 months by warmth.
Plan for daytime highs near 20.3°C and cooler evenings around 8.7°C.