Costa Rica

The Caribbean weather region has no definable dry season, but that doesn't mean there isn't any sun. The least rainy months tend to be February/March and September/October. On average, the Caribbean weather region receives 141 inches of rain per year, with the rainiest months being July, November and December. Despite all the rain, patches of sunshine pierce through the clouds and radiate the landscape in between the scattered showers. All months have at least four to five hours of sun daily except July, the cloudiest and rainiest month of the year. March and April are the sunniest months with more than five to six hours of sun per day. Temperatures are relatively consistent year round with daily averages between 77 and 81 degrees. May, June and October are the warmest months with average daily highs of 88 degree while the coolest day time temperatures are found during January, February, July and December, with an average of 84 degrees. Night time temperatures range from 68 to 71 degrees and are usually cool and comfortable. 

Most days are blessed with trade winds that help buffer the high humidity, The Caribbean weather region is the most humid region in Costa Rica.  Humidity values are fairly consistent throughout the year. March and April tend to be the least humid months at 84 percent humidity while the rest of the year experiences averages between 87 and 90 percent humidity.  June, July, November and December are the most humid with values reaching 90 percent humidity (these are also the rainiest months).

 Guapiles

Limon

Sixaola

Tortuguero

Source: National Weather Services of Costa Rica