Although Costa Rica is a small country in terms of area, the climate is diverse and varied. Costa Rica can be divided into several climatic zones, each of which are distinct and individual. Though generally classified as a tropical country because of its close proximity to the equator, Costa Rica has no real winter period, and the sun shines here throughout the year. With over 12 hours of sunshine a day, the sun rises at about 5 am and sets at about 6 pm consistently throughout the year.
The main reason for the diversity in Costa Rica’s weather is the various elevations at which different parts of the country are located. In the highlands the temperature averages 13 degree Celsius, while in the lowlands or at sea level the temperature stays at around 26 degrees Celsius or 79 degrees Fahrenheit, with hot days and sultry evenings.
In Costa Rica the average annual temperature is around 21 to 27 degrees Celsius or 70 to 81 degrees Fahrenheit and the coolest months of the year are November, December and January. The months March through May are the hottest months of the year, so make sure you protect yourself from the sun.
There is no real summer or winter in Costa Rica and the rainy season here lasts from May to November, with the months of December through April having little to no rain and September and October being the heaviest rain period. With tradewinds keeping the weather hot and humid most of the year, there is no real dry season out here and it rains very often.