In August, San Jose typically sees daytime highs of 28.6°C and overnight lows around 13.3°C. Compared to the annual average high of 21.3°C, August runs +7.3°C.
August in San Jose averages a daytime high of 28.6°C and an overnight low of 13.3°C.
August runs +7.3°C compared to San Jose's annual average high of 21.3°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 28.6°C and cooler evenings around 13.3°C.