Visiting local bars in San Andres is better when you know what the weather holds. These rainfall averages and temperatures can help you choose the best time for bar hopping. The hottest months are usually June and May with an average temp of 83°F, while the coldest months are February and January with an average of 79°F. The rainiest months in San Andres are December, January, October, and July, with each month seeing an average of 15 inches of rainfall.