Weather is probably a major factor when you plan your trip to El Castillo, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually April and May, with an average temperature of 26°C, while the coldest months are January and February, with an average of 24°C. The rainiest months in El Castillo are June, July, October and August, with each month seeing an average of 368 mm of rainfall.