In April, the weather in Yuzhno-Sakhalinsk is typically cold. Average daily high temperature in April is about 4 degrees above zero. On average, Yuzhno-Sakhalinsk has 9 rainy, 9 partly cloudy, 7 sunny, and 5 cloudy days in April. The rains are usually moderate. April as well as January, February, May, and October is considered the most uncomfortable time to visit Yuzhno-Sakhalinsk.