March weather forecast
Brazil

March heralds the end of summer in Brazil, transitioning towards milder temperatures compared to the scorching heat experienced in the preceding months of January and February. The northeastern regions and the Amazon Basin experience a slight decrease in temperatures, which generally remain above 30°C (86°F), although no longer reaching the peaks of the summer months.

Coastal cities, including Rio de Janeiro, retain their moderate temperatures with a range of 22.8°C (73°F) to 27.2°C (81°F), offering a comfortable climate for visitors. Notably, the sea temperatures along the coasts of north-central Brazil become especially inviting for swimming, typically registering between 21.1°C (70°F) to 23.9°C (75°F). This warming trend of the ocean waters contributes to the appeal of Brazil's magnificent beaches.

In the southern parts of Brazil, the climate maintains its temperate character, but a gradual shift towards cooler conditions begins as the country moves towards the autumn season. The highlands and mountains also see a decrease in temperatures compared to February, paving the way for cooler weather in the forthcoming month of April.

Rainfall in March tends to decrease, yet significant precipitation is still recorded in many parts of the country, particularly in the Amazon region. This continued rainfall fosters the thriving biodiversity, sustaining the health of the world's largest rainforest. Conversely, the northeastern regions of the country remain relatively dry, reflecting the persistent arid conditions of this area.

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• São Paulo - March »
  January, March, April and December, with an average relative humidity of 80%, are the most humid months in São Paulo. January through March, November and December, with an average maximum UV index of 12, are months with the highest UV index in São Paulo, Brazil.
• Rio de Janeiro - March »
  In March, the average sea temperature in Rio de Janeiro is 25.8°C (78.4°F). In March, the average heat index, which factors the actual air temperature with the relative humidity, is computed to be 33°C (91.4°F).
• Brasília - March »
  The most humid month in Brasília is March, with an average relative humidity of 87%. With an average relative humidity of 87%, March is the most humid month in Brasília.
• Salvador - March »
  The month with the warmest seawater in Salvador is March, with an average sea temperature of 28.6°C (83.5°F). January through March, September through December, with an average maximum UV index of 12, are months with the highest UV index in Salvador, Brazil.
• Fortaleza - March »
  Fortaleza in March is notable for its higher relative humidity of 84.7%, contributing to the warm and humid weather that the city is known for. On the first day of March in Fortaleza sunrise is at 05:41 and sunset at 17:51.
• Belo Horizonte - March »
  In Belo Horizonte in March, during 14 rainfall days, 164mm (6.46") of precipitation is typically accumulated. March sees further relaxation in the rainfall to 164mm (6.46"), indicating the beginning of a dry spell in Belo Horizonte, that will last for the coming few months.
• Manaus - March »
  Marking the end of the first quarter of the year, March in Manaus experiences the highest recorded rainfall of 335mm (13.19") spanning over 20 days of the month. The month with the most rainfall in Manaus is March, when the rain falls for 20 days and typically aggregates up to 335mm (13.19") of precipitation.
• Curitiba - March »
  In Curitiba during March, the rain falls for 12 days and regularly aggregates up to 139mm (5.47") of precipitation. As Curitiba, Brazil transitions towards autumn in March, local and visitors find the weather more comfortable, especially towards the end of the month.
• Recife - March »
  The month with the warmest seawater in Recife is March, with an average sea temperature of 28.9°C (84°F). With an average sea temperature of 28.9°C (84°F), March is the month with the warmest seawater in Recife.
• Porto Alegre - March »
  The weather in March in Porto Alegre is marked by a dip in temperature to 28°C (82.4°F) and a slight increase in humidity. March days in Porto Alegre are filled with intermittent sunshine leading to pleasant weather conditions for outdoor pursuits.
• Goiânia - March »
  In Goiânia during March, the rain falls for 15 days and regularly aggregates up to 207mm (8.15") of precipitation. On the last day of March, in Goiânia, Brazil, sunrise is at 06:22 and sunset at 18:19 -03.
• Guarulhos - March »
  On the first day of March in Guarulhos, sunrise is at 06:01 and sunset at 18:35. The commencement of March in Guarulhos notes an average high-temperature of a still moderately hot 27°C (80.6°F), exhibiting little difference from the previous month.