August in Quesnel is the warmest month of the year. In August, the weather in Quesnel is typically warm. Average daily high temperature in August is about 20 degrees above zero. On average, Quesnel has 14 partly cloudy, 13 sunny, 3 rainy, and 1 cloudy day in August. The rains are usually light. August as well as July is considered the most comfortable time to visit Quesnel.