In September, Mission typically sees daytime highs of 33.8°C and overnight lows around 22.2°C. Compared to the annual average high of 29.4°C, September runs +4.3°C.
September in Mission averages a daytime high of 33.8°C and an overnight low of 22.2°C.
September runs +4.3°C compared to Mission's annual average high of 29.4°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 33.8°C and cooler evenings around 22.2°C.