July in Skien averages a daily high of 22.7°C with nights around 11.9°C. Expect roughly 17.8 wet days totalling 93.1mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Skien is June–September.
Based on GVARV NES, NO (30.1km), 1995–2024. 28 years of July data.