July in Kotka averages a daily high of 21.3°C with nights around 15.1°C. Expect roughly 10.1 wet days totalling 46.8mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Kotka is June–August.
Based on KOTKA RANKKI, FI (10.2km), 1995–2024. 30 years of July data.