Weather will likely play an important role when you plan your trip to King Salmon, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually July and August with an average temp of 51°F, while the coldest months are January and March with an average of 22°F. The snowiest months in King Salmon are December, February, November, and March, with each month seeing an average of 19 inches of snowfall.