Daytime highs, nighttime lows and the warmest cities across Brazil this September.
Brazil, experiences maximum daytime temperatures in September ranging from 18°C (64°F) in Cassino to 38°C (100°F) in Teresina. Nighttime temperatures generally drop to 24°C (75°F) in Teresina and 14°C (57°F) in Cassino.
Explore the map below to discover average September temperatures at the top destinations in Brazil. For a deeper dive, simply click on any destination dot.
Check the conditions for any month of the year.
Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Brazil.
Marker color shows the average daytime high temperature in September: blue is cold, red is hot.
Rio de Janeiro averages a daytime high of 27°C (81°F) in September, which is high for Brazil.
Rio de Janeiro sees nighttime lows close to 19°C (66°F) in September.
Based on our systematic data collection, Teresina has been identified as the city with the highest average temperatures. The daytime temperature usually hovers around 38°C (100°F), while at night it goes down to an approximate temperature of 24°C (75°F).
For the month of September, Cassino is the most temperate city in Brazil based on our records. Highs average 18°C (64°F) and nighttime temperatures dip to around 14°C (57°F).
Across Brazil, sunshine in September ranges from overcast in Ubatuba (80 hours) to sunny in Iguatu (307 hours).
Across Brazil, sea temperatures in September range from good at 21°C (70°F) in Rio de Janeiro to perfect at 28°C (82°F) in Belém — so swimming conditions depend on which coast you pick.
We have much more information about the climate in Brazil.
Weather and climate has detailed information for every country in the world. Are you going to Brazil? Get detailed historical weather averages for many cities in Brazil.
Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.
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