Taking into account the local weather in Santa Bárbara 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 66°F, while the coldest months are July and January with an average of 66°F. The rainiest months in Santa Bárbara are November, October, April, and March, with each month seeing an average of 18 inches of rainfall.