Cancun weather

Our guide to the weather in Cancun during September

31

Average high

7

UV Index

103mm

Month rainfall

29

Sea temperature

We've looked at the most up-to-date weather data for Cancun, covering the last 12 years up to 2021, plus we've asked our team of travel bloggers for their first-hand experiences in order to answer the most frequently asked questions about Cancun weather in September.

How hot is it in Cancun during September?

The temperature is extremely stable in September with average highs of 31℃ and lows just 4℃ lower at 27℃. Of course, the high humidity will make it feel even hotter. The UV index will be high at this time of year, so protection against skin and eye damage is needed. Try to limit exposure between 10am and 4pm. Apply broad spectrum SPF 30+ sunscreen every few hours, even if it's cloudy, or more frequently after sweating or swimming, and wear UV-blocking sunglasses too, and bear in mind that bright surfaces, such as sand and water increase UV exposure.

Does it rain in Cancun during September?

On average, there will be 22 rainy days during the month, amounting to 102.5mm in total. That's a significant amount of rain. For comparison, the wettest months in the UK typically sees between 80mm and 100mm, depending on where you are. Due to the high temperature and humidity, you might expect lots of thunderstorms, however they're actually fairly infrequent at this time of year. On average, September will see just 4 days that produce a storm.

How warm is the sea in Cancun during September?

The water around Cancun reaches a very pleasant 29℃ during September. This is very warm, and will feel bath-like. People who normally feel the cold will find this temperature perfectly acceptable. The hot air temperature will mean that you will feel comfortably warm when coming out of the water.

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Cancun Blog posts

From the UK's most popular travel bloggers

27th November 2018 by John

Cancun travel guide

Holiday Extras are doing a good series of YouTube destination guides. This one covers Cancun, famous for having colourful nightlife and flashy all-inclusive hotels. But there is another side to this region and we're going to show you why it’s worth exploring. Take a couple of hours drive from the city and witness Mayan culture, historical ruins, stripped back beaches, and nature in all its beauty....

Weather in Cancun

Our month-by-month guide to the weather and climate in Cancun

25.8

Cancun weather in

January
26.6

Cancun weather in

February
27.3

Cancun weather in

March
28.7

Cancun weather in

April
29.7

Cancun weather in

May
30.1

Cancun weather in

June
30.8

Cancun weather in

July
31.0

Cancun weather in

August
30.5

Cancun weather in

September
29.3

Cancun weather in

October
27.6

Cancun weather in

November
26.9

Cancun weather in

December