page_title: Panama
section_title: Climate
hierarchical_section_title: Panama / Geography / Climate
caption_attribution_description: Español: Vista del poblado de Boquete y el Río Caldera, provincia de Chiriquí, Panamá.
context_page_description: Panama, officially the Republic of Panama, is a transcontinental country in Central America and South America, bordered by Costa Rica to the west, Colombia to the southeast, the Caribbean Sea to the north, and the Pacific Ocean to the south. The capital and largest city is Panama City, whose metropolitan area is home to nearly half the country's 4 million people.
  Panama was inhabited by indigenous tribes before Spanish colonists arrived in the 16th century. It broke away from Spain in 1821 and joined the Republic of Gran Colombia, a union of Nueva Granada, Ecuador, and Venezuela. After Gran Colombia dissolved in 1831, Panama and Nueva Granada eventually became the Republic of Colombia. With the backing of the United States, Panama seceded from Colombia in 1903, allowing the construction of the Panama Canal to be completed by the US Army Corps of Engineers between 1904 and 1914. The 1977 Torrijos–Carter Treaties led to the transfer of the Canal from the United States to Panama on December 31, 1999. The surrounding territory was transferred in 1979.
context_section_description: Panama has a tropical climate. Temperatures are uniformly high—as is the relative humidity—and there is little seasonal variation. Diurnal ranges are low; on a typical dry-season day in the capital city, the early morning minimum may be 24 °C (75.2 °F) and the afternoon maximum 30 °C (86.0 °F). The temperature seldom exceeds 32 °C (89.6 °F) for more than a short time. Temperatures on the Pacific side of the isthmus are somewhat lower than on the Caribbean, and breezes tend to rise after dusk in most parts of the country. Temperatures are markedly cooler in the higher parts of the mountain ranges, and frosts occur in the Cordillera de Talamanca in western Panama.
  Climatic regions are determined less on the basis of temperature than on rainfall, which varies regionally from less than 1,300 millimeters (51.2 in) to more than 3,000 millimeters (118.1 in) per year. Almost all of the rain falls during the rainy season, which is usually from April to December, but varies in length from seven to nine months. In general, rainfall is much heavier on the Caribbean than on the Pacific side of the continental divide. The annual average in Panama City is little more than half of that in Colón. Although rainy-season thunderstorms are common, the country is outside the hurricane belt.
  Panama's tropical environment supports an abundance of plants. Forests dominate, interrupted in places by grasslands, scrub, and crops. Although nearly 40% of Panama is still wooded, deforestation is a continuing threat to the rain-drenched woodlands. Tree cover has been reduced by more than 50 percent since the 1940s. Subsistence farming, widely practised from the northeastern jungles to the southwestern grasslands, consists largely of corn, bean, and tuber plots. Mangrove swamps occur along parts of both coasts, with banana plantations occupying deltas near Costa Rica. In many places, a multi-canopied rain forest abuts the swamp on one side of the country and extends to the lower reaches of slopes on the other.
caption: A cooler climate is common in the Panamanian highlands.
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