There's nothing like an all-inclusive holiday in Dolores to rejuvenate you, especially when you know what to expect from the elements. Here's some information to help you decide when to book: The hottest months are usually January and February, with an average temperature of 21°C, while the coldest months are July and June, with an average of 10°C. June and August are the driest months, while December and February are the rainiest months.