Hot weather-lovers will enjoy Cancun in the summer. June sees an average of 7.8 inches of rain, with July and August each receiving an average of 4.2 inches or rain. The rain may be welcome to cool things off, since the beach sand can become too hot to walk on in your bare feet. Daytime temperatures hover near 90 degrees, and because the sun is highest in the sky at this time of year, visitors should be particularly careful to avoid sunburn.
Fall brings cooler air temperatures, but the ocean is still warm from the summer sun and is quite comfortable for swimming. September, October and November see average temperatures between 80 and 90 degrees, with nighttime temperatures in the comfortable mid-70s. The downside of visiting in the fall is a greatly increased chance of precipitation in September (averaging 9 inches of rain) and October (averaging 8.6 inches of rain). Fall brings brisk winds, and tropical storms or hurricanes may occur, particularly during September and October.
Cancun's winter months are the coolest and least humid. Daytime temperatures average just slightly above 80 degrees, and evening temperatures dip below 70 degrees. According to the Dummies.com website, November is an ideal month to visit Cancun, since vegetation is green after the rainy season, and cooler temperatures create brilliantly clear skies. The ocean has cooled, but on sunny days the water remains mild enough for swimming.
Cancun's temperatures begin to climb into the mid-80s again in March, April and May. March and April are Cancun's two driest months, with an average of only 1.7 inches of rain. May leads into a rainier period with an average of 4.5 inches of precipitation. The ocean is warm enough for comfortable swimming. Spring is a very popular time to visit, particularly during spring break (the end of March and beginning of April), when many college students and families with young children vacation.
This part of Mexico has two rainy seasons, according to the website All About Cancun. Between May and June, and again between October and December, it may rain several times a week. Although tropical rain can be heavy, it usually does not rain for long. The rains can appear and disappear quickly, so vacationers should check weather reports before heading out on sightseeing trips.
