In May, the weather in Sumbawa Besar is typically hot. Average daily high temperature in May is about 28 degrees above zero. On average, Sumbawa Besar has 19 rainy, 9 sunny, 2 partly cloudy, and 1 cloudy day in May. The rains are usually moderate. May as well as January, February, March, and April is considered the most uncomfortable time to visit Sumbawa Besar.