May in Drummondville is the rainiest month of the year. In May, the weather in Drummondville is typically warm. Average daily high temperature in May is about 16 degrees above zero. On average, Drummondville has 20 rainy, 6 sunny, and 5 partly cloudy days in May. The rains are usually heavy. May as well as April, June, October, and November is considered the most uncomfortable time to visit Drummondville.