October weather forecast
Brazil

October ushers in the spring season in Brazil, with the northern and Amazon Basin regions experiencing a steady rise in temperatures, frequently reaching above 30°C (86°F) during the day. The nights turn progressively warmer, indicating the complete withdrawal of the winter season.

In the coastal cities, including Rio de Janeiro, the temperature continues to rise modestly, ranging from 22.8°C (73°F) to 27.2°C (81°F). The warming sea temperatures along the north-central coast make for enjoyable coastal activities and create favourable conditions for marine wildlife, marking a period of vibrant sea life.

In the south, temperatures continue to rise, with October offering a pleasant spring climate. The regions south of the Tropic of Capricorn witness a significant increase in temperatures, marking a clear transition from the cold winters to the mild spring season. The frost and snowfall that characterised the highlands and mountains during winter are completely absent by October.

With respect to rainfall, October sees the onset of the wet season in many parts of Brazil. The Amazon region receives substantial rainfall, although still lower than its peak levels. The northeastern regions receive increased rainfall, which helps replenish the water sources after the extended dry spell. Rainfall continues to increase across Brazil in October, setting the stage for the peak wet season that characterises the ensuing months.

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• São Paulo - October »
  In São Paulo, in October, during 10 rainfall days, 127mm (5") of precipitation is typically accumulated. On the last day of October, in São Paulo, sunrise is at 05:20 and sunset at 18:19 -03.
• Rio de Janeiro - October »
  With an average of 7.5h of sunshine, October has the least sunshine of the year in Rio de Janeiro, Brazil. In Rio de Janeiro, the average seawater temperature in October is 22.7°C (72.9°F).
• Brasília - October »
  The weather in October in Brasília, Brazil shares its similarities with September, but with rainfall increasing noticeably from 19mm (0.75") to 166mm (6.54"). On the first day of October in Brasília, sunrise is at 05:53 and sunset at 18:08.
• Salvador - October »
  In Salvador in October, the average water temperature is 26.3°C (79.3°F). On the first day of October in Salvador, sunrise is at 05:16 and sunset at 17:30.
• Fortaleza - October »
  On the first day of October in Fortaleza sunrise is at 05:19 and sunset at 17:27. In Fortaleza, in October, the average water temperature is 26.8°C (80.2°F).
• Belo Horizonte - October »
  The average relative humidity in October in Belo Horizonte is 69.8%. In Belo Horizonte the average relative humidity in October is 69.8%.
• Manaus - October »
  On the first day of October in Manaus sunrise is at 05:45 and sunset at 17:53. The average heat index, which combines relative humidity and air temperature, in October is calculated to be 47°C (116.6°F).
• Curitiba - October »
  October in Curitiba brings a mixed bag of climatic conditions - moderate temperatures, longer daylight hours, and an increase in rainfall. On the first day of October in Curitiba sunrise is at 05:55 and sunset at 18:17.
• Recife - October »
  On the first day of October in Recife, sunrise is at 05:03 and sunset at 17:14. October's weather in Recife depicts a pleasant drawdown from the torrid, rainy phase of the preceding months.
• Porto Alegre - October »
  On the last day of October, in Porto Alegre, Brazil, sunrise is at 05:30 and sunset at 18:46 -03. In October, the average sea temperature in Porto Alegre is 18.9°C (66°F).
• Goiânia - October »
  In Goiânia during October, the rain falls for 12 days and regularly aggregates up to 167mm (6.57") of precipitation. On the first day of October in Goiânia, sunrise is at 05:58 and sunset at 18:14.
• Guarulhos - October »
  When is the sunrise / sunset in October in Guarulhos? In October, Guarulhos's weather is characterized by further warming trends and a stabilized rainfall pattern.