What's the weather like in Cancun in September?
Located on Mexico’s Yucatán Peninsula, Cancún’s one of the country’s most popular holiday destinations thanks to its glorious weather and stunning Caribbean Sea. If you're heading to Cancún in September then you'll get plenty of sun, although it’s also the wettest month of the year.
Cancún has a tropical climate with high temperatures all year round and a distinct rainy season. The dry season’s from November to April, while the wet season’s May to October. September gets more rain than any other month, although it often comes in short sharp downpours.
The average high in Cancún during September’s 33ºC, so it’s nice and warm. It doesn't get much cooler at night, with temperatures only falling to 23ºC, so you don't need to bring many warm clothes for the evenings. The sea temperature’s a warm 29ºC, so it’s perfect for relaxing in the water, while humidity’s very high. Average rainfall’s 229mm over 14 rainy days, although you can still expect 12 hours of daylight with six hours of sunshine each day. Wear sun cream as UV levels are extremely high. Sunset’s just after 7pm at the start of the month and gradually gets earlier.