In September, Casa Grande typically sees daytime highs of 37.5°C and overnight lows around 19.8°C. Compared to the annual average high of 30.0°C, September runs +7.5°C.
September in Casa Grande averages a daytime high of 37.5°C and an overnight low of 19.8°C.
September runs +7.5°C compared to Casa Grande's annual average high of 30.0°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 37.5°C and cooler evenings around 19.8°C.