In September, Sao Jose typically sees daytime highs of 22.6°C and overnight lows around 11.9°C. Compared to the annual average high of 25.0°C, September runs -2.4°C.
September in Sao Jose averages a daytime high of 22.6°C and an overnight low of 11.9°C.
September runs -2.4°C compared to Sao Jose's annual average high of 25.0°C, ranking #9 of 12 months by warmth.
Plan for daytime highs near 22.6°C and cooler evenings around 11.9°C.