In May, San Luis typically sees daytime highs of 20.2°C and overnight lows around 7.3°C. Compared to the annual average high of 24.7°C, May runs -4.5°C.
May in San Luis averages a daytime high of 20.2°C and an overnight low of 7.3°C.
May runs -4.5°C compared to San Luis's annual average high of 24.7°C, ranking #9 of 12 months by warmth.
Plan for daytime highs near 20.2°C and cooler evenings around 7.3°C.