August in Welland averages a daily high of 25.9°C with nights around 14.9°C. Expect roughly 10.2 wet days totalling 69.8mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Welland is May–September.
Based on WELLAND PELHAM, ON CA (7.1km), 1995–2024. 17 years of August data.