November in Thornhill averages a daily high of 7.8°C with nights around 0°C. Expect roughly 11.9 wet days totalling 69.3mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Thornhill is May–September.
Based on TORONTO NORTH YORK, ON CA (4.9km), 1995–2024. 27 years of November data.