In July, San Mateo typically sees daytime highs of 28.7°C and overnight lows around 18.5°C. Compared to the annual average high of 29.6°C, July runs -0.8°C.
July in San Mateo averages a daytime high of 28.7°C and an overnight low of 18.5°C.
July runs -0.8°C compared to San Mateo's annual average high of 29.6°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 28.7°C and cooler evenings around 18.5°C.