August in Saint-Louis-de-Terrebonne averages a daily high of 25.8°C with nights around 15.2°C. Expect roughly 8.6 wet days totalling 90.9mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Saint-Louis-de-Terrebonne is May–September.
Based on RIVIERE DES PRAIRIES, QC CA (22.3km), 1995–2024. 27 years of August data.