July in Arnhem averages a daily high of 23.3°C with nights around 12.5°C. Expect roughly 14.2 wet days totalling 87.4mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Arnhem is May–September.
Based on DEELEN, NL (8.8km), 1995–2024. 30 years of July data.