Visiting local bars in Watson Lake is more fun in good weather. These rainfall averages and temperatures can help you choose the best time for bar hopping. The hottest months are usually July and June with an average temp of 55°F, while the coldest months are December and January with an average of 4°F. The snowiest months in Watson Lake are January, November, December, and February, with each month seeing an average of 13 inches of snowfall.