January weather forecast
Brazil

January marks the peak of summer in Brazil, with some of the highest temperatures of the year. It is one of the warmest months, with temperatures soaring above 37.8°C (100°F) in the northeastern regions. The Amazon Basin also experiences hot weather; however, temperatures rarely cross 32.2°C (90°F) due to the heavy humidity and dense foliage.

In contrast to the north, the Atlantic coast offers more moderate temperatures ranging from 22.8°C (73°F) to 27.2°C (81°F), a pleasant respite to those unaccustomed to the Brazilian heat. The city of Rio de Janeiro is a notable location, where people are drawn to the sandy beaches to revel in the warm sea waters and vibrant cultural festivities, despite the high humidity.

In the southern regions of Brazil, the temperate climate keeps the heat relatively mild. However, the heat is more intense when compared to the preceding month of December and the following month of February. The mountainous areas south of Rio de Janeiro and beyond the Tropic of Capricorn often experience a slight decrease in temperatures due to their higher altitudes.

January is also a time of substantial rainfall in Brazil. The Amazon region and other parts of the country experience frequent and intense rain showers. Cities like Manaus in the Amazon Basin witness high humidity and abundant rainfall, making it a challenging period for outdoor activities. In contrast, the northeastern part of the country remains drier due to its arid climate, despite the high evaporation rates.

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• São Paulo - January »
  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. January, March, April and December, with an average relative humidity of 80%, are the most humid months in São Paulo.
• Rio de Janeiro - January »
  The transition from December to January in Rio de Janeiro, Brazil, sees an average high-temperature of a still moderately hot 29.2°C (84.6°F), indicating a minor variance from the prior month. Kicking off the year, January in Rio de Janeiro, Brazil is characterized by a tropically warm climate with high relative humidity.
• Brasília - January »
  In January, conditions in Brasília, Brazil can be described as particularly wet with significant rainfall of 145mm (5.71"), most occurring over the course of 25 days. January, March, August through November, with an average maximum UV index of 6, are months with the highest UV index in Brasília, Brazil.
• Salvador - January »
  In January, the average heat index, which takes the relative humidity and factors it into the air temperature reading, is evaluated at 37°C (98.6°F). On the first day of January in Salvador sunrise is at 05:11 and sunset at 18:03.
• Fortaleza - January »
  The average relative humidity in January in Fortaleza is 78.1%. Kickstarting the year in Fortaleza, Brazil, January presents a striking mix of air, water and sunshine elements.
• Belo Horizonte - January »
  The most humid month in Belo Horizonte, Brazil, is January, with an average relative humidity of 79%. Belo Horizonte registers an average high-temperature of a still moderately hot 28.2°C (82.8°F) with the arrival of January, showing minor deviation from the preceding month.
• Manaus - January »
  In Manaus in January, during 19 rainfall days, 264mm (10.39") of precipitation is typically accumulated. On the first day of January in Manaus, sunrise is at 05:54 and sunset at 18:12.
• Curitiba - January »
  The months with the lowest humidity in Curitiba are January, April and August, with an average relative humidity of 79%. The months with the highest UV index in Curitiba are January through March, November and December, with an average maximum UV index of 12.
• Recife - January »
  Balmy temperatures and high humidity mark the weather in January in Recife, Brazil. The months with the highest UV index in Recife are January through April, September through December, with an average maximum UV index of 12.
• Porto Alegre - January »
  The month with the warmest seawater in Porto Alegre is January, with an average sea temperature of 24.7°C (76.5°F). In Porto Alegre in January, the average water temperature is 24.7°C (76.5°F).
• Goiânia - January »
  The average heat index, which combines relative humidity and air temperature, in January is appraised at 34°C (93.2°F). On the first day of January in Goiânia, Brazil, sunrise is at 05:47 and sunset at 18:53.
• Guarulhos - January »
  The month with the most rainfall days in Guarulhos is January, when the rain falls for 14 days. The month with the most rainfall days in Guarulhos is January, when the rain falls for 14 days.