August in Fredrikstad averages a daily high of 21°C with nights around 10.8°C. Expect roughly 12.5 wet days totalling 103.2mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Fredrikstad is June–August.
Based on RADE TOMB, NO (12.7km), 1995–2024. 12 years of August data.