April in Mont Joli is the rainiest month of the year. In April, the weather in Mont Joli is typically cold. Average daily high temperature in April is about 4 degrees above zero. On average, Mont Joli has 15 rainy, 8 cloudy, 4 sunny, 2 partly cloudy, and 1 snowy day in April. The rains are usually heavy. April as well as January, February, May, and October is considered the most uncomfortable time to visit Mont Joli.