In May, San Martin typically sees daytime highs of 19.4°C and overnight lows around 6.1°C. Compared to the annual average high of 24.9°C, May runs -5.5°C.
May in San Martin averages a daytime high of 19.4°C and an overnight low of 6.1°C.
May runs -5.5°C compared to San Martin's annual average high of 24.9°C, ranking #9 of 12 months by warmth.
Plan for daytime highs near 19.4°C and cooler evenings around 6.1°C.