Rio de Janeiro
September
Weather in Rio de Janeiro for September 2026
Your guide to Rio de Janeiro weather in September - trends and predictions
In general, the average temperature in Rio de Janeiro at the beginning of September is 25.9 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 26.4 °C by the end of September.
With an average of 5 rainy days, Rio de Janeiro experiences minimal rainfall in September.
Temperatures
Rain 🌧️
25
Dry days
5
Rainy days
0
Snow days
28°/20°
Temperatures
18 km/h
Avg max wind
69 %
Avg humidity
Rio de Janeiro Weather September
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Temperatures trend during September in Rio de Janeiro
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September weather in Rio de Janeiro day by day
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| 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. | Sunny | 27° /20° | 0.2 mm | 7 | |
| 19 Sept. | Sunny | 27° /19° | 0 mm | 8 | |
| 20 Sept. | Sunny | 28° /20° | 0 mm | 8 | |
| 21 Sept. | Sunny | 30° /21° | 0.5 mm | 8 | |
| 22 Sept. | Sunny | 31° /21° | 4.4 mm | 8 | |
| 23 Sept. | Sunny | 26° /21° | 1.9 mm | 7 | |
| 24 Sept. | Sunny | 28° /21° | 1.3 mm | 7 | |
| 25 Sept. | Partly cloudy | 26° /20° | 4.3 mm | 7 | |
| 26 Sept. | Partly cloudy | 27° /20° | 2.1 mm | 7 | |
| 27 Sept. | Partly cloudy | 29° /20° | 0.3 mm | 8 | |
| 28 Sept. | Light rain shower | 23° /18° | 2.6 mm | 6 | |
| 29 Sept. | Patchy rain possible | 25° /19° | 0.2 mm | 7 | |
| 30 Sept. | Sunny | 27° /18° | 0 mm | 7 | |
| Next | |||||
Important Notice
Our weather forecast for Rio de Janeiro in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Rio de Janeiro forecast closer to your planned date for the most up-to-date weather information.
Change Month
Rio de Janeiro in September - FAQ
What are the expected maximum and minimum temperatures in Rio de Janeiro during September?
During September, expect a variety of temperatures with highs around 28° and lows near 20°, suitable for diverse activities and preferences.
How much rainfall should be expected in Rio de Janeiro during September?
Expect minimal rainfall in Rio de Janeiro during September, with a total of 15.4 mm over approximately 5 days. This minimal precipitation is unlikely to significantly impact plans.
What are the typical wind conditions in Rio de Janeiro during September?
The average wind speed in Rio de Janeiro during September is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
Rio de Janeiro water temperatures in September
The average water temperature of the Atlantic Ocean near Rio de Janeiro in September is 19.3 °C. At the beginning of September temperatures are around 19 °C; by the end of the month they get a bit warmer and reach 19.5 °C.
- What is the water temperature in Rio de Janeiro in September?
- The average water temperature in Rio de Janeiro in September is 19.3 °C.
- Can you swim in Rio de Janeiro 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 Rio de Janeiro
Explore the daily rainfall trends and prepare for Rio de Janeiros September weather 💧
UV exposure in Rio de Janeiro during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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