In May, the weather in Luangprabang is typically hot. Average daily high temperature in May is about 31 degrees above zero. On average, Luangprabang has 21 rainy, 5 sunny, 3 cloudy, and 2 partly cloudy days in May. The rains are usually heavy. May as well as June, July, August, and September is considered the most uncomfortable time to visit Luangprabang.