June in Ratchaburi is the cloudiest month of the year. In June, the weather in Ratchaburi is typically hot. Average daily high temperature in June is about 33 degrees above zero. On average, Ratchaburi has 24 rainy and 6 cloudy days in June. The rains are usually heavy. June as well as May, July, August, and September is considered the most uncomfortable time to visit Ratchaburi.