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Costa Rica Weather

Costa Rica 3D view  Costa Rica is located geographically only about eight degrees of north latitude of the equatorial line, thus Costa Rican climate is tropical all year round. However, because of the extraordinarily diverse amount of involved factors, the resulting country climate is a set of regional sub-climates. Therefore, the tropical weather of Costa Rica is greatly affected by its geography at the very local level. These factors include the totally heterogeneous relief (ranging from 0 to 3,431 m in only 51,100 km²) and the way as all its components (mountains, volcanoes, plains, valleys and plateaus) are distributed; the situation in respect to the two continental masses as American isthmus; the influence of the Pacific and Atlantic Oceans (sea winds and ocean current with their own temperatures, besides low pressure systems, tropical depressions, tropical storms and hurricanes) and the general atmospheric circulation.

(En Español: Clima de Costa Rica)

Current Weather of Costa Rica - Updated Satellite Image

Latest Image - GOES-12 1 km (VIS/Infrared on night). Updates each ½h.
Based on Costa Rica satellite images thanks to Space Science and Engineering Center (University of Wisconsin-Madison).
- * -
* As the image time is Universal Time Coordinated or UTC (as before with GMT), subtract 6 h to get Costa Rica time.

Costa Rica
Location: 9°55'N 84°4'W (At the center of America, in the American Isthmus).
Subdivisions: Provinces: 7, Cantons: 81, Districts: 473
Area: 51,100 km² (19,730 sq mi) | Population: 4,563,539 (2010)

Main Climatic Subdivisions:
Rainfall Regions (Drainage Basins Systems):
     Pacific: Dry and rainy period well defined. The dry one is from December to April.
     Caribbean: Dry period is not well defined (less rainy months have 100-200 mm of rainfall.
Climatic Regions:
     Northern Pacific, Central Pacific, Southern Pacific, Central Region, Northern Zone, Northern Caribbean and Southern Caribbean


The only Official Information and Current Weather Reports in Costa Rica are from Instituto Meteorológico Nacional (National Weather Institute)
Partly Cloudy & Rainy Conditions Suscribe to Costa Rica weather Atom feeds See its Current Weather and Forecast Report (In spanish, but is a graphically eloquent flash-animated map report):
Sunday 4 October 2015 ☼☁ | ☼☁☂ | ✧☽☁
Partly cloudy to Cloudy | Downpours & Thunderstorms
This Sunday in Costa Rica rainy conditions will remain in the Pacific, Caribbean and mountains in the Central Valley. In the morning there will be little windy, warm and very little cloud cover conditions across the country. In the afternoon and evening there will be intermittent rain and downpours in the Pacific and Central Valley; plus the Caribbean mountains and nearby will have intermittent rainfall. It is expected that rainfall in the North Pacific occur mainly in the Nicoya Peninsula.

Central Valley: Partly cloudy.
North Pacific: Partly cloudy.
Central Pacific: Partly cloudy.
South Pacific: Partly cloudy.
North Caribbean: Cloudy with rain.
South Caribbean: Cloudy with rain.
North Zone: Partly cloudy.

Central Valley: Cloudy with rain.
North Pacific: Partly cloudy.
Central Pacific: Cloudy with rain.
South Pacific: Cloudy with rain and thunderstorms.
North Caribbean: Partly cloudy.
South Caribbean: Partly cloudy.
North Zone: Partly cloudy.

Central Valley: Partly cloudy.
North Pacific: Partly cloudy.
Central Pacific: Partly cloudy.
South Pacific: Partly cloudy.
North Caribbean: Partly cloudy.
South Caribbean: Partly cloudy.
North Zone: Partly cloudy.
Temperatures in Costa Rica

Temperatures (Max/Min ºC):
San José 26º/18º | Alajuela 30º/19º | Cartago 24º/17º | Heredia 29º/17º | Puntarenas 32º/21º | Liberia 32º/22º | Nicoya 31º/22º | Quepos 31º/22º | Golfito 31º/22º | San Isidro de El General 31º/22º | Isla del Coco 31º/22º | Limón 31º/22º | Guápiles 30º/21º | Sixaola 32º/23º | Ciudad Quesada 27º/18º | Upala 30º/21º

Source: Juan Diego Naranjo (Meteorologist) - Instituto Meteorológico Nacional (IMN)

Costa Rica Weekly Weather Forecast ( 8 - 14 June 2015)

Instituto Meteorológico Nacional (IMN)

Suscribe to Costa Rica weather Atom feed, weekly forecast included

Partly cloudy to Cloudy | Rainy Season
Dry Season persist at Northern Pacific

 This week begins under extremely unstable conditions in the country. The presence of a low pressure system over the Pacific Ocean causes that rain and downpours of varying intensity occur. There are significant accumulated rain in some parts of the Pacific and Central Valley from the early Monday.

This phenomenon will continue in the ocean with a tendency to gradually move northward during the week. It is anticipated that it is reinforcing the rainy evening activity from Monday on the country, especially in the Pacific, the Central Valley and the mountains of the Caribbean and the North Zone.

Moreover, it is estimated that along the week persist the rainy season unstable conditions, which in turn will lead to the occurrence of rainfall of varying intensity, accompanied by thunderstorms during the afternoon and evening in the regions of Pacific, Central Valley, the Northern Zone and Caribbean mountains.

Source: Instituto Meteorológico Nacional (IMN) - (Costa Rica National Weather Institute)

Costa Rica Weather in the month of June

Monthly Weather Characterization from IMN

Suscribe to Costa Rica weather Atom feed, monthly information included

 June is the month characterized by a decrease in the trade winds, consequently an increase in rainfall in the South and Central Pacific and Central Valley will be presented.

The Intertropical Convergence Zone approaches the country favoring unstable atmospheric conditions. Added to this, the occurrence of climatic disturbances such as low pressure systems will produce periods of cloudy days with persistent rain.

Source: Instituto Meteorológico Nacional (IMN) - (Costa Rica National Weather Institute)

Current Oceanic Influence (4 October 2015)

From USA National Hurricane Center Advisories

4 October 2015, 02:05 pm EDT
No Significant Climatic Disturbances
 The oceanic surroundings of Costa Rica remain with no significant climatic disturbances in this moment.

There are not significant climatic disturbances at this time.
Satellite photograph of Central America (4 October 2015, 17:45 UTC).
NOAA - National Weather Service
Satellite Image of Caribbean Sea & Central America
Sources: NASA / USA National Hurricane Center - NOAA / National Weather Service

Costa Rica Weather, General Description

 The seasons of Costa Rica climate are defined by the amount of rain that falls during a particular period of time. The year can be easily divided into two main periods or seasons, named by the local residents as "Verano", summer and "Invierno", winter. The "Verano" season is from December to April, and is the time of the year when there are more blue skies and few rains. The "Invierno" is the rainy period, from May to November, and during this time, in most locations, it rains constantly; with sunny mornings, sometimes cool, sometimes sweltering, and the rain coming during the first hours of afternoon.

The maximum rain quantity received is at the Northeastern lowlands, the Caribbean, near the Orosi Valley, Arenal and Monteverde areas, Talamanca Range, Osa Peninsula and Golfito (Southern Pacific) (annual rainfall of over 5,000 mm). Humidity is also higher on the Caribbean side than on the Pacific. The mean annual temperature on the coastal lowlands is around 80 °F (27 °C), 69 °F (21 °C) in the main populated areas of the Central Cordillera, and below 50 °F (10 °C) on the summits of the highest mountains. In the highest areas of Irazú Volcano (3,431 m) and Chirripó (3,810 m), temperatures sometimes can drop below 0 ºC.

The driest season of Costa Rica in most places is from December to April, while the rainy season is from May to November. On the Caribbean coast, however, December is by far the more wet month. The highlands areas are always cooler. The lowest elevation level in the country is the Pacific Ocean at sea level, the highest point is Cerro Chirripó, a somewhen glaciated mountain with an elevation of 3,810 m (part of Chirripó National Park). Even on a clear day, it is possible to see both the Caribbean Sea and the Pacific Ocean from the top.

Notes & References:
- The standard air pressure at sea level in millibars is 1013.25 mba, which is the value of 1 atmosphere, or 1013.25 hPa in IS units (1 mba = 1 hPa).
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