In September, El Monte typically sees daytime highs of 29.9°C and overnight lows around 15.3°C. Compared to the annual average high of 23.8°C, September runs +6.1°C.
September in El Monte averages a daytime high of 29.9°C and an overnight low of 15.3°C.
September runs +6.1°C compared to El Monte's annual average high of 23.8°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 29.9°C and cooler evenings around 15.3°C.