August in Granby averages a daily high of 24.9°C with nights around 15°C. Expect roughly 12 wet days totalling 115.8mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Granby is May–September.
Based on GRANBY, QC CA (2.2km), 1995–2024. 27 years of August data.