April in Kohtla-Jarve is the sunniest month of the year. In April, the weather in Kohtla-Jarve is typically cold. Average daily high temperature in April is about 7 degrees above zero. On average, Kohtla-Jarve has 10 sunny, 8 rainy, 7 partly cloudy, and 5 cloudy days in April. The rains are usually light. April as well as October, November, and December is considered the most uncomfortable time to visit Kohtla-Jarve.