In September, Cayenne typically sees daytime highs of 31.8°C and overnight lows around 22.6°C. Compared to the annual average high of 30.0°C, September runs +1.8°C.
September in Cayenne averages a daytime high of 31.8°C and an overnight low of 22.6°C.
September runs +1.8°C compared to Cayenne's annual average high of 30.0°C, ranking #1 of 12 months by warmth.
Plan for daytime highs near 31.8°C and cooler evenings around 22.6°C.