Costa Rica, a tropical country, rich with its biodiversity, has two distinct seasons-dry and wet. Just like its beauty its weather is also varied in different parts of this country. If you travel from one side of country to another or from the coast to the mountains, you will enjoy an entirely different microclimate. You will enjoy cooler environment in the higher areas as those have more rain. The different weather patterns happen for its various elevations. Here goes a short description of Regional Weather of Costa Rica:
In Caribbean Region you will not enjoy any definable dry season. In this region average rainfall is 141 inches per year. During the month of February/March and September/October it receives less rain and the rainiest months are July, November and December. Except July all the months of the year get at least four to five hours of sun and that is why the July is the cloudiest and coolest month of the year. If you visit this region during March and April you will enjoy sunshine more than five to six hours per day. These two months are least humid with 84 percent humidity while the other months of the year experiences averages between 87 and 90 percent humidity. During the month of June, July, November and December the humidity remains 90 percent that makes these months most humid. Throughout the year temperatures remains average between 77 and 81 degrees. During the month of May, June and October the you will enjoy warmest environment when the average daily highs is of 88 degree and During January, February, July and December the temperature remains an average of 84 degrees. During night the temperatures remains between 68 to 71 degrees that keeps the environment cooler and comfortable.
Central Pacific Region:
In this region the weather is less consistent due to its location and its blending of coastal areas and mountains. From the western parts of the San Jose and Puntarenas provinces the central Pacific weather region runs. Average rainfall along the coast is 143 inches per year and the average rainfall is almost doubles to 262 inches per year in the mountain areas that are up to 2,500 feet above sea level. During the month of January, February and March you will enjoy dry season in this region and in the rest of the year it remains wet season and in October this region receives more rain. During the rainy months you will enjoy sun for five hours and from January to April there are typically eight hours of sun. In the mountains the average temperature is 63 degrees in the mountains and 81 degrees on the coast. Between January and May along the coast the average say time temperatures remains highest as it reaches 90 degrees and never drop below 71 degrees at night but at the mountain the temperature can drop to 48 degrees.
Central Valley Region:
The provinces of Heredia, San Jose, Alajuela and Cartago is included in this region. This region receives 77.4 inches of annual rainfall. During the month of December to March you will enjoy dry season in this area and at the time of April and November it is the months of transition. The average temperatures exceed 84 degrees and the lowest average temperatures are mere 64 degrees. This region has average humidity about 75% and during the dry season it drops to 69%. If you visit this area during the months of May through November, you will enjoy wet season that mean more rainfall and less sunshine. July is the driest months and you will enjoy at least four hours of sun in the morning before the afternoon storms develop. People who love rain they can visit the area during September and October when the area receives average rain 26 inches per month and the environment remains most humid.
North Pacific Region:
Some of the most popular tourist destination is included in this region. This region has an average annual temperature of 82 degrees. April is the warmest month when the temperature reach 100 degrees in this area. Between November and March you will enjoy the coolest nights as that time the temperatures go down and it remains average of 66 degrees. November through April in this region you will enjoy dry season almost without any rain. You will have sunshine ten hours every day and the temperature remains between 89 and 96 degrees. Though the wet season in between the months of May and October, the rainiest moths are June, September and October and during the month of July the region get less rain. During the wet season the humidity remain at 80 and 85 percent but at the time of dry season the humidity is only 60 to 65 percent.
North Pacific Region includes some of the popular tourist destinations and the country’s driest weather in a province known as Guanacaste. Popular towns are Tamarindo, Samara, Playa del Coco, Liberia, Playa Flamingo, Nosara, and Tilaran.
Northern Weather region:
In this region the rain patterns are evenly disturbed but the highlands such as Monteverde and Arenal receives a larger rain than the lowlands.So the temperature also varied in lowlands and highlands. Daytime temperatures remains between 86 degrees in the lowlands and in the highlands it is average 70 degrees. During night in the mountains the temperature drops to 55 degrees that makes the environment cooler and in the lowlands the temperature remains around 68 degrees. If you want to visit this region during the dry season, you will have to go between January through April. It recieves lowest rainfall during the month of March and April and at that time the humidity levels (an average of 75%) coincide with the decreased rainfall. In both the lowlands and highlands the humidity levels remains on average 85 percent in the rest of the year.
Northern Weather region includes some of the popular tourist destinations of Arenal and Monteverde.
South Pacific Region:
This region has shorter dry season and receives more intense afternoon storms. The dry season is from the end of the December to April and at this time the average temperatures are 79 degrees along the coast that varies during day and night. During the month of May to November in the wet season the lowlands receives 157 inches of rain per year while the Osa Peninsula receives more than 197 inches of rain per year. In this region the humidity remains average of 75 percent during the dry season. During late June or July in this region you will experience a little dry season as it receives less rainfall.
South Pacific Region includes some of the popular tourist destinations of Drake Bay, Cabo Matapalo, Carate, Playa Zancudo, Uvita, Puerto Jimenez, Dominical, Pavones, Ojochal.
Southern Nicoya Peninsula Region:
Known for its great weather, the Southern Nicoya Peninsula is a transition zone. As it has a warm climate almost throughout the year, except April to November, this region is considered having the best weather of the Pacific Coast of Costa Rica. This region remains drier than many of the southern beach areas and wetter than the super-dry north of Guanacaste. If you visit this region during the months of April-November, you will get the rainy season that makes most of the roads difficult to pass as rivers wash them out during this time. The real rain months are September and October when this area is the least busy and touristic time of the year. From the mid December until April on this region you can expect brilliant sunshine. The week after Easter and soon after the first rainfalls initiate the rainy season Low season begins. During this season this area receives rains occasionally in the late afternoon and at this time the land is verdant green, and sunsets multi-hued.