Weather is probably a major factor when you plan your trip to San Simon, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually March and April, with an average temperature of 25°C, while the coldest months are December and January, with an average of 24°C. The rainiest months in San Simon are September, June, May and October, with each month seeing an average of 255 mm of rainfall.