Taking into account the local weather in Sunnyslope is an important factor for planning your visit, especially if you plan to spend your trip poolside. The hottest months are usually July and August with an average temp of 67°F, while the coldest months are December and January with an average of 31°F. The snowiest months in Sunnyslope are January, December, February, and March, with each month seeing an average of 6 inches of snowfall.