July in Kotka is the warmest month of the year. In July, the weather in Kotka is typically warm. Average daily high temperature in July is about 19 degrees above zero. On average, Kotka has 13 sunny, 10 partly cloudy, 7 rainy, and 1 cloudy day in July. The rains are usually light. July as well as {{month_nom: February}}, and {{month_nom: February}} is considered the most comfortable time to visit Kotka.