In August, the weather in L'Ancienne-Lorette is typically warm. Average daily high temperature in August is about 21 degrees above zero. On average, L'Ancienne-Lorette has 13 sunny, 11 partly cloudy, and 7 rainy days in August. The rains are usually moderate. August as well as July is considered the most comfortable time to visit L'Ancienne-Lorette.