August in Whitby averages a daily high of 25.1°C with nights around 16.1°C. Expect roughly 9.5 wet days totalling 70.1mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Whitby is June–September.
Based on OSHAWA WPCP, ON CA (8.2km), 1995–2024. 24 years of August data.