April in Sandviken is the sunniest month of the year. In April, the weather in Sandviken is typically cold. Average daily high temperature in April is about 9 degrees above zero. On average, Sandviken has 10 partly cloudy, 9 sunny, 7 rainy, and 4 cloudy days in April. The rains are usually light. April as well as February, March, May, and October is considered the most uncomfortable time to visit Sandviken.