January in Ubon Ratchathani is the sunniest month of the year. In January, the weather in Ubon Ratchathani is typically hot. Average daily high temperature in January is about 28 degrees above zero. On average, Ubon Ratchathani has 19 partly cloudy, 11 sunny, and 1 rainy day in January. The rains are usually light. January as well as December is considered the most comfortable time to visit Ubon Ratchathani.