UV Index
UV Index
Today's UV index in Cancún, Mexico 
will be up to 11.4, indicating a extreme level of sun exposure for the average person. Check our tips for today to make sure you're safe in the sun.
Last checked: 2025-05-26
UV index at 11.4 in Cancún means extreme risk: limit outdoor time especially from 10 a.m. to 4 p.m., actively seek shade, wear protective clothing, broad-brimmed hat, apply SPF 30+ sunscreen every 2 hours, and wear UV-blocking sunglasses. Watch for bright surfaces like water and snow increasing UV exposure.
Cancún often has a UV index ranging from moderate to very high, especially between March and September, meaning the sun can be strong during the daytime. The UV index peaks in the late spring and early summer months.
The weather in Cancún is warm and humid year-round, with a wet season from June to October bringing heavy rain and occasional storms. The dry season from November to May is sunnier and less humid, making it popular for tourists.
Compared to other parts of Mexico, Cancún is hotter and more humid due to its coastal location. It is also warmer and wetter than many inland areas and has a more tropical climate than northern Mexico. Neighboring countries like Cuba have similar tropical weather patterns.
See the UV index hour by hour for Cancún, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.