In October, the weather in Chiang Rai is typically hot. Average daily high temperature in October is about 29 degrees above zero. On average, Chiang Rai has 18 rainy, 7 sunny, 5 partly cloudy, and 1 cloudy day in October. The rains are usually heavy. October as well as May, June, July, and August is considered the most uncomfortable time to visit Chiang Rai.