In September, Tucson typically sees daytime highs of 34.9°C and overnight lows around 18.9°C. Compared to the annual average high of 28.3°C, September runs +6.6°C.
September in Tucson averages a daytime high of 34.9°C and an overnight low of 18.9°C.
September runs +6.6°C compared to Tucson's annual average high of 28.3°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 34.9°C and cooler evenings around 18.9°C.