In May, El Cajon typically sees daytime highs of 23.5°C and overnight lows around 10.0°C. Compared to the annual average high of 23.9°C, May runs -0.4°C.
May in El Cajon averages a daytime high of 23.5°C and an overnight low of 10.0°C.
May runs -0.4°C compared to El Cajon's annual average high of 23.9°C, ranking #6 of 12 months by warmth.
Plan for daytime highs near 23.5°C and cooler evenings around 10.0°C.