July in Sundsvall averages a daily high of 20.6°C with nights around 11.3°C. Expect roughly 12.2 wet days totalling 77.6mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Sundsvall is June–August.
Based on SIDSJO, SW (1.5km), 1995–2024. 12 years of July data.