Effects of high humidity. Humidity is considered too high when its level goes above 45% - 50%, sometimes as high as 80% and up. High humidity can be especially dangerous when combined with high temperature - as mentioned above, high humidity disrupts the body's ability to cool itself, which may lead to a heat stroke.
The average sea surface temperature in April 2017 for Cancun was 84.0Â°F. The maximum and minimum values were 83.0Â°F and 85.4Â°F respectively.
Weather Forecast cities. Playa del Carmen in April; Puerto Aventuras in April; Tulum in April; Travel Guides. Mexico; Yucatan; Cancun; With an excellent weather comfort indicator of 84/100, Cancun has very pleasant weather conditions in the month of April. Average temperatures start at 21Â°C in the morning and rise to 33Â°C over the course of the afternoon. In August there are 6 hours of sunshine per day and one can bathe in the 26Â°C Caribbean Sea. April in Cancun is the dry season and it only rains for 4 days in the month with 36mm of precipitation in total. The weather prediction service in Cancun is based on a calculation which takes into account historic data from the last 10 years, as well as predictions based on certain criteria such as air temperature, humidity, water temperature, wind speed and sunshine.