Taking into account the local weather in Alder 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 63°F, while the coldest months are December and January with an average of 21°F. The snowiest months in Alder are February, October, March, and January, with each month seeing an average of 6 inches of snowfall.