Explore historical and projected climate data, climate data by sector, impacts, key vulnerabilities and what adaptation measures are being taken. Explore the overview for a general context of how climate change is affecting Brazil.

Climate Data Historical

Brazil’s climate varies from equatorial in the north to temperate in the south. Nearly 59% of the Amazon, the largest humid equatorial rainforest and river basin in the world, is in Brazil, contributing to the country’s rich biodiversity, various climates, and extraordinary wealth of ecosystems. Within the Amazon Basin, the average temperature is 27.9˚C during the dry season and 25.8˚C during the rainy season. The Amazon region surrounding the mouth of the Amazon River experiences an excess of 3,000 mm of rainfall annually, whereas the northwestern region of the Brazilian Amazon is drier, with annual rainfall between 1,500 and 1,700 mm. According to the USAID Climate Risk Profile, key historical climate trends include:


  • Temperature in the Amazon Basin has warmed 0.5˚C since 1980, with greater warming in the dry season.
  • The number of cold nights has increased overall for the country, but decreased in the states of Santa Catarina and Paraná.
  • The number of warm days during the dry season has increased moderately, but there has been a significant increase in the number of warm days in the winter.


  • The tropical wet region, covering most of the Amazon, has experienced a 5% increase in rainfall over the last 30 years.
  • The Amazon has seen 3 significant droughts in the last 20 years (2005, 2010, 2015/16), often associated with the El Niño-Southern Oscillation (ENSO). 

This section provides the options to visualize historical climate data for different timeframes via map and annual cycle chart.


Click on map to change chart data from country aggregated to site-specific data.