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 »
  The months with the highest humidity in São Paulo are January, March, April and December, with an average relative humidity of 80%. The months with the highest UV index in São Paulo are January through March, November and December, with an average maximum UV index of 12.
• Rio de Janeiro - March »
  With an average sea temperature of 25.8°C (78.4°F), March is the month with the warmest seawater in Rio de Janeiro. With an average sea temperature of 25.8°C (78.4°F), March is the month with the warmest seawater in Rio de Janeiro.
• Brasília - March »
  January, March, August through November, with an average maximum UV index of 6, are months with the highest UV index in Brasília, Brazil. March's arrival in Brasília registers an average high-temperature of a still moderately hot 25.8°C (78.4°F), closely aligning with the temperature of the previous month.
• Salvador - March »
  March is the month with the warmest seawater in Salvador with an average sea temperature of 28.6°C (83.5°F). The month with the warmest seawater in Salvador is March, with an average sea temperature of 28.6°C (83.5°F).
• 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. In Fortaleza in March, the average water temperature is 28.8°C (83.8°F).
• Belo Horizonte - March »
  On the first day of March in Belo Horizonte, sunrise is at 05:53 and sunset at 18:22. In Belo Horizonte, during March, the rain falls for 14 days and regularly aggregates up to 164mm (6.46") of precipitation.
• 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 most humid month in Manaus is March, with an average relative humidity of 88%.
• Curitiba - March »
  The months with the highest UV index in Curitiba are January through March, November and December, with an average maximum UV index of 12. In Curitiba during March, the rain falls for 12 days and regularly aggregates up to 139mm (5.47") of precipitation.
• Recife - March »
  March is the month with the warmest seawater in Recife 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 first day of March in Goiânia sunrise is at 06:16 and sunset at 18:41.
• Guarulhos - March »
  On the first day of March in Guarulhos sunrise is at 06:01 and sunset at 18:34. In Guarulhos, Brazil, during March, it is raining for 11 days.