January in Weihai is the snowiest and the coldest month of the year. In January, the weather in Weihai is typically cold. Average daily high temperature in January is about 1 degree above zero. On average, Weihai has 18 sunny, 12 partly cloudy, and 1 snowy day in January. The snowfalls are usually light. January as well as February and December is considered the most uncomfortable time to visit Weihai.