Taking into account the local weather in Santo Domingo de Silos is an important factor for planning your visit, especially if you plan to spend your trip poolside. The hottest months are usually September and August with an average temp of 57°F, while the coldest months are January and December with an average of 57°F. The rainiest months in Santo Domingo de Silos are May, April, October, and November, with each month seeing an average of 11 inches of rainfall.