You might spend a lot of your vacation inside, but if you're planning to venture beyond the casino, looking at local weather trends is a good idea. The hottest months are usually March and April with an average temp of 68°F, while the coldest months are January and February with an average of 66°F. The rainiest months in Guachipelin are October, June, September, and August, with each month seeing an average of 26 inches of rainfall.