Due to its close proximity to the equator, Costa Rica is considered to be a sub-tropical haven. This country's extraordinary climate offers mild tropic-like conditions that prevail year-round. You will rarely experience discomforting temperature extremes or prolonged periods of gray.
There are twelve distinct climatic zones with temperatures that vary according to elevation. San Jose and the Central Valley is thought by some to have the best climate in the country, due to its temperate year-round average of 22°C (72° F ). Country-wide, the average temperature is 21-27°C (70-81° F). Temperatures on the Atlantic coast have a mean of about 28°C (82°F) and 32°C (89°F) on the Pacific. Temperatures in the mountains can drop into the 10°C range (50's in Fahrenheit). The warm waters along the coastal areas are usually around 23°C (74°F).
The area that has the highest humidity and receives the most rainfall is the Caribbean Costal region, with an annual reading of over 5,000mm (197").This region has no well-defined dry season.The driest and hottest climate can be found in the Northern Pacific.
In Costa Rica the sun shines throughout the year, with daylight lasting for over twelve hours, and there is no real winter season.The three coolest months are November through January, and the three hottest months tend to be March through May.
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Costa Rica has two recognized seasons: the “dry season” usually starts in December and goes through April, the "wet season" - when there are daily afternoon rains throughout the country - typically lasts from May through November.Some people prefer to call this season with heavier precipitation "the green season" -- since the plants and foliage explode into their full bloom, similar to spring in more northern climates.
