December is the official start of Costa Rica’s dry season. Consequently, the country’s peak season also begins around this time. Hotels may be more expensive. Goods and services also increase as well. The number of travelers doubles making it necessary to arrange trips ahead of time. December is the second month of the year (The other is either March or April – whenever Easter is.) where people, Ticos and foreigners – alike – crowd the beaches and shorelines of Costa Rica.
Temperatures during the holidays are at an agreeable 60-80 degrees Fahrenheit with an average rainfall of 10 inches – a far cry from the rainy season’s record. Humidity is still pegged at 85% on average. The Caribbean side of Costa Rica is usually wetter as compared to the Pacific side. Beaches and lowlands experience a much higher temperature while those in mid-elevation or in the mountainous area are bound to get a cooler climate due to occasional temporales del Atlantico – polar air coming from the Gulf of Mexico which picks up heat and moisture. This causes parts of the Caribbean to experience a few days of continuous rain.
The holidays, most especially Christmas, in Costa Rica is a matter of the utmost importance. Establishments may be closed the whole week all through New Year’s, while others close just for the two main holidays, Christmas and New Years. This may be an important piece of information as you plan your getaway. Figure out or incorporate into your plan certain days when businesses may not be available to service you.