March in Cancun is typically hot, dry and unmarred by cloudy skies. March occurs during Cancun's dry season, and it is one of the driest and sunniest months on average. Temperatures are typically between 71 and 84 degrees Fahrenheit.
March and April can sometimes be very humid in Cancun, as they are the last two months before the rainy season begins. Humidity is often as high as 80 percent. Temperatures are lower in the dry season than during the rainy season, but humidity can make even the lower temperatures seem hot and uncomfortable. Strong trade winds create breezes during these months that can relieve the discomfort when humidity is particularly high.