Taking into account the local weather in Susa is an important factor for planning your visit, especially if you plan to spend your trip poolside. The hottest months are usually January and February with an average temp of 59°F, while the coldest months are January and August with an average of 59°F. The rainiest months in Susa are April, May, November, and March, with each month seeing an average of 12 inches of rainfall.