In September, Pasadena typically sees daytime highs of 30.8°C and overnight lows around 21.8°C. Compared to the annual average high of 25.3°C, September runs +5.5°C.
September in Pasadena averages a daytime high of 30.8°C and an overnight low of 21.8°C.
September runs +5.5°C compared to Pasadena's annual average high of 25.3°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 30.8°C and cooler evenings around 21.8°C.