In September, Guadalajara typically sees daytime highs of 25.9°C and overnight lows around 11.4°C. Compared to the annual average high of 18.8°C, September runs +7.1°C.
September in Guadalajara averages a daytime high of 25.9°C and an overnight low of 11.4°C.
September runs +7.1°C compared to Guadalajara's annual average high of 18.8°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 25.9°C and cooler evenings around 11.4°C.