Weather in Brazil for September 2025
Until now, September 2025 in Brazil is cooler than usual, with temperatures averaging 24.1 °C, this is -2.6 °C below the typical seasonal average.
The forecast for the next days in Brazil predicts temperatures to be around 26 °C, close to the historical average.
In general, the average temperature in Brazil at the beginning of September is 25.9 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 21.9 °C by the end of September.
With an average of 5 rainy days, Brazil experiences minimal rainfall in September.
Temperatures
Rain 🌧️
Brazil Weather September
What’s the Weather Like in Brazil This September?
Temperatures trend during September in Brazil
September weather in Brazil day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Partly cloudy | 26° /18° | 0.1 mm | 7 | |
| 2 Sept. |  Patchy rain possible | 26° /19° | 0.2 mm | 7 | |
| 3 Sept. |  Sunny | 26° /19° | 0 mm | 8 | |
| 4 Sept. | Sunny | 28° /19° | 0 mm | 8 | |
| 5 Sept. |  Light drizzle | 28° /19° | 0.4 mm | 7 | |
| 6 Sept. | Patchy rain possible | 23° /19° | 3.1 mm | 6 | |
| 7 Sept. | Patchy rain possible | 24° /19° | 1.8 mm | 6 | |
| 8 Sept. | Sunny | 27° /19° | 0 mm | 7 | |
| 9 Sept. | Sunny | 29° /19° | 0 mm | 8 | |
| 10 Sept. | Sunny | 26° /19° | 0.2 mm | 7 | |
| 11 Sept. | Sunny | 28° /19° | 0 mm | 8 | |
| 12 Sept. | Sunny | 28° /20° | 0.2 mm | 7 | |
| 13 Sept. | Sunny | 28° /20° | 0.2 mm | 7 | |
| 14 Sept. |  Overcast | 29° /20° | 0 mm | 7 | |
| 15 Sept. | Overcast | 24° /18° | 1.3 mm | 6 | |
| 16 Sept. | Partly cloudy | 26° /18° | 2.4 mm | 7 | |
| 17 Sept. | Sunny | 25° /20° | 0.9 mm | 7 | |
| 18 Sept. | Patchy rain possible | 26° /19° | 0.1 mm | 2.1 | |
| 19 Sept. | Sunny | 30° /19° | 0 mm | 2.2 | |
| 20 Sept. | Sunny | 32° /22° | 0 mm | 2.2 | |
| 21 Sept. | Sunny | 33° /24° | 0 mm | 2 | |
| 22 Sept. | Patchy rain possible | 35° /22° | 0.6 mm | 0.7 | |
| 23 Sept. |  Moderate rain | 20° /19° | 5 mm | 6 | |
| 24 Sept. | Patchy rain possible | 20° /17° | 1.2 mm | 5 | |
| 25 Sept. | Moderate rain | 17° /16° | 9.5 mm | 5 | |
| 26 Sept. | Patchy rain possible | 21° /16° | 3.7 mm | 5 | |
| 27 Sept. | Patchy rain possible | 22° /16° | 0.3 mm | 5 | |
| 28 Sept. | Sunny | 23° /15° | 0 mm | 6 | |
| 29 Sept. | Sunny | 25° /16° | 0 mm | 7 | |
| 30 Sept. | Sunny | 25° /17° | 0 mm | 7 | |
| Next | |||||
Guide for Brazil in September
In September, Brazil experiences a transition from winter to spring, resulting in varied weather conditions across the country. At the beginning of the month, the southern regions, including cities like Sao Paulo and Rio de Janeiro, typically have mild temperatures ranging from 15° to 25°.
These areas may also experience occasional rainfall, contributing to the lush greenery and vibrant flora that Brazil is known for.
Moving towards the end of September, the northern regions, such as Manaus and the Amazon rainforest, tend to have warmer and more humid weather, with temperatures averaging around 25° to 35°.
These areas may also experience brief, intense rain showers, which are essential for the diverse ecosystems and wildlife found in the Amazon region.
Overall, September in Brazil offers a diverse range of weather conditions, making it an exciting time to visit and explore the country's natural beauty. Whether you prefer the milder climate of the south or the tropical warmth of the north, Brazil has something to offer for every type of traveler.
Brazil in September - FAQ
Brazil water temperatures in September
The average water temperature of the Atlantic Ocean near Brazil in September is 18.9 °C. At the beginning of September temperatures are around 19 °C; by the end of the month they stay fairly steady and reach 18.5 °C.
- What is the water temperature in Brazil in September?
- The average water temperature in Brazil in September is 18.9 °C.
- Can you swim in Brazil in September?
- Refreshing and invigorating. Expect to feel chilled after 10–20 minutes; a shorty wetsuit extends water time, especially at dawn.
September rainfall patterns in Brazil
UV exposure in Brazil during September
Quick links
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