May in Xalapa is the warmest month of the year. In May, the weather in Xalapa is typically warm. Average daily high temperature in May is about 22 degrees above zero. On average, Xalapa has 26 rainy, 3 sunny, 1 cloudy, and 1 partly cloudy day in May. The rains are usually heavy. May as well as April, June, July, and August is considered the most uncomfortable time to visit Xalapa.