In April, the weather in King Salmon is typically cold. Average daily high temperature in April is about 4 degrees above zero. On average, King Salmon has 12 cloudy, 6 rainy, 5 sunny, 5 partly cloudy, and 2 snowy days in April. The rains are usually light. April as well as May, June, July, and August is considered the most uncomfortable time to visit King Salmon.