In September, Perris typically sees daytime highs of 32.5°C and overnight lows around 14.2°C. Compared to the annual average high of 25.5°C, September runs +7.0°C.
September in Perris averages a daytime high of 32.5°C and an overnight low of 14.2°C.
September runs +7.0°C compared to Perris's annual average high of 25.5°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 32.5°C and cooler evenings around 14.2°C.