Weather In Cancun In September 2025. Expect 32°c daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in cancun in september. Cancún weather in september are you planning a holiday with hopefully nice weather in cancún in september 2025?
You can expect around 22 rainy days, with on average 3.5 inches / 88 mm of rain during the whole month. Cancun weather in september 2025.