Although 90 percent of the country is within the tropical zone, more than 60 percent of the population lives in areas where altitude, sea winds, or old polar fronts moderate the temperature. The geographical location of Brazil influences its climatic diversity. The northern most region is on the Equator and the southern most region is below the Tropic of capricorn. The climate here is a function of latitude and altitude and it varies from north to south and from east to west, creating five different climatic regions throughout the country: equatorial, tropical, semi arid, highland tropical, and subtropical.
Temperatures range from very hot and dry in the northeast, humid and rainy in the Amazon to frosty temperatures below zero, and in extreme cases snow, in the south west interior of Brazil. The distinct weather between regions may also contribute to the different lifestyles that abound here.
Weather by region Brazil is an excellent choice all year around. You can check the weather according to your preferences with the information below.
Contrary to popular belief that the Amazon is blistering hot, the average annual temperature is around 25°C (77°F) and rarely exceeds 32°C (90°F), with little variation throughout the year. Humidity can be high and heavy rains can occur depending on the season. This area is the rainiest and most humid in Brazil.
Pantanal has two distinct seasons: the rainy season (December to March) and the dry season (July to October). Temperatures range from very hot and humid to 10°C (50°F) in winter (June to August).
The climate is humid subtropical with over 1700mm of annual rainfall and no dry season. Relative humidity is between 80-90%. Annual mean temperature of 21°C (70°F), which decreases to 19°C (66°F) above about 500m.
Fernando de Noronha
The climate is tropical, with two well defined seasons: the rainy season from January to August, and the dry season for the rest of the year. The average temperature is 26°C (79°F), with a variation of only 7.4°C. The relative humidity varies little from 82% due to the islands characteristics. Average annual sunshine is 3.215 hours per day, with a maximum in November and a minimum in April. The best time for diving is from April to November and the ideal time for surfing is during January and February.
Temperatures in Bahia vary according to whether you?re on the coast or inland, but it is sunny and warm almost all year round. On the coast it rarely drops below about 24°C (75°F), however inland, in areas such as Chapada Diamantina, evenings are chilly and warm clothes are required. There is a distinct rainy season from May to September. Occasionally cold fronts from the south follow the coast up to the north east and the weather will suddenly change and the temperature drops.
Rio de Janeiro
Being a tropical zone, temperatures should be high, but the influence of the Serra do Mar affects all aspects of climate, giving the state a wider variation in temperature and rainfall than would otherwise be expected. The coastal temperatures can be up to 40°C (104°F) with high rains and humidity, and as low as 18°C (64°F) in a cold spell. Whereas in areas close to the mountains, such as Paraty and Itaipava the temperatures are much cooler and there is less of a dry season. As in Bahia, cold fronts sometimes occur.
Weather by Season December to May (Brazilian Summer)
Rains occur throughout the year but this season is the wettest with heavy rainfall varying throughout the region. Close to the Andes, up to 4,000 mm annually and in Manaus, under 2,000 mm. The humidity can be high and the temperature averages 26°C (79°F).
This is the rainy season (wettest in February), when most of the area floods, mosquitoes abound and the cattle crowd on to the few islands remaining above the water. It is very muddy and often difficult for cars to get through. It is also very hot and humid with temperatures averaging 32°C in the summer.
In the summer season the area around the falls is hot and humid with an average temperature of 25°C, although the spray from the falls is a marvelous way to cool off. The water is higher and the natural wildlife is also more abundant.
Fernando de Noronha
January to August is the rainy season. The heaviest rains occur between March and July, sometimes reaching almost 20cm (8 inches) in 24 hours in March and April. The hottest months are January, February and March.
Summer in Brazil is actually from December to March, although in Bahia it is almost always hot and sunny, with temperatures of up to 33°C (91°F). The humidity can sometimes be up to 60%. Although this is the dry season all along the coast, inland in the Chapada Diamantina it is wetter than during the rest of the year.
Rio de Janeiro
In these months it is hotter than in the dry season, with temperatures soaring to 40°C (104°F) and humid. Due to the often high humidity it rains more during this season.
Brazil Weather By Season June to November (Brazilian Winter)
This is officially the dry season in the Amazon, with October being the driest month. June and July are the months when the water level is at its highest, due to the quantity of rain that has fallen in the wet season. During these months it is possible to navigate through the flooded forests with a canoe to get a better view of the tops of the trees and the animal life that exists there. Temperatures in the dry season can rise to above 30°C (86°F).
Temperatures can be as cool as 10°C (50°F) in the winter and warm clothing is necessary, especially at night. The dry season is the nesting and breeding season. Hundreds and thousands of birds crowd the trees and the white sand river beaches are exposed with jacarés (crocodiles) basking in the sun.
In the winter the average temperature is 15°C (59°F). During this season the water is much diminished, as are the birds and insects.
Fernando de Noronha
September to December is the dry season. October is the driest month, when rainfall will not be greater than 9mm (0.36 inch) in a 24 hour period.
July and August is officially the rainy season, when the temperature drops to around 26°C (79°F) and the rainfall is heavier than throughout other months. There are still many sunny days during these months and shorts and a t-shirt can always be worn. Although it is the rainy season in nearly the entire state, inland in the mountains this is the dry season.
Rio de Janeiro
Between June and August is the dry season in the state of Rio, with the rest of the year rainy to a greater or lesser degree. Although it is drier it is cooler than in the summer with temperatures ranging from 22°C to 32°C (72°F – 90°F).