Taking into account the local weather in Ione 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 62°F, while the coldest months are December and January with an average of 25°F. The snowiest months in Ione are January, December, October, and February, with each month seeing an average of 11 inches of snowfall.