April in Nonthaburi is the hottest month of the year. In April, the weather in Nonthaburi is typically hot. Average daily high temperature in April is about 34 degrees above zero. On average, Nonthaburi has 13 rainy, 6 sunny, 6 partly cloudy, and 5 cloudy days in April. The rains are usually heavy. April as well as May, June, July, and August is considered the most uncomfortable time to visit Nonthaburi.