Taking into account the local weather in Planneralm 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 58°F, while the coldest months are January and February with an average of 29°F. The rainiest months in Planneralm are July, May, August, and June, with each month seeing an average of 8 inches of rainfall.