Taking into account the local weather in Arietta 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 65°F, while the coldest months are January and February with an average of 26°F. The snowiest months in Arietta are January, March, December, and April, with each month seeing an average of 10 inches of snowfall.