Rio de Janeiro
September
Weather in Rio de Janeiro for September 2027
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 24.6 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 25.8 °C by the end of September.
Rio de Janeiro experiences moderate rainfall in September, with an average of 9 rainy days and a total precipitation of 79.2 mm.
Is September a good time to visit Rio de Janeiro? check out the best time to travel to Rio de Janeiro page.
Temperatures
Rain 🌧️
More
21
Dry days
9
Rainy days
0
Snow days
26°/19°
Temperatures
19 km/h
Avg max wind
74 %
Avg humidity
Rio de Janeiro Weather September
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Temperatures trend during September in Rio de Janeiro
See the weather trend as well as the moving average line
September weather in Rio de Janeiro day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Light rain | 25° /18° | 4.2 mm | 6 | |
| 2 Sept. | Light rain | 25° /19° | 2.8 mm | 6 | |
| 3 Sept. |  Sunny | 25° /19° | 0 mm | 7 | |
| 4 Sept. | Sunny | 28° /20° | 0 mm | 8 | |
| 5 Sept. | Light drizzle | 26° /20° | 1.5 mm | 7 | |
| 6 Sept. | Light rain | 22° /19° | 7.8 mm | 5 | |
| 7 Sept. | Light rain | 22° /18° | 5.4 mm | 5 | |
| 8 Sept. | Sunny | 25° /19° | 0.7 mm | 6 | |
| 9 Sept. | Light rain | 28° /20° | 3.4 mm | 7 | |
| 10 Sept. | Light rain | 25° /20° | 9.9 mm | 6 | |
| 11 Sept. | Light rain | 28° /20° | 2.8 mm | 6 | |
| 12 Sept. | Sunny | 27° /21° | 0.9 mm | 7 | |
| 13 Sept. |  Patchy rain possible | 26° /20° | 1.8 mm | 6 | |
| 14 Sept. | Light rain | 27° /20° | 4 mm | 6 | |
| 15 Sept. | Light rain | 23° /19° | 3.6 mm | 5 | |
| 16 Sept. | Patchy rain possible | 25° /18° | 2.4 mm | 6 | |
| 17 Sept. | Patchy rain possible | 24° /20° | 1 mm | 5 | |
| 18 Sept. | Patchy rain possible | 25° /20° | 0.2 mm | 6 | |
| 19 Sept. | Sunny | 26° /19° | 0.1 mm | 7 | |
| 20 Sept. | Sunny | 28° /20° | 0 mm | 7 | |
| 21 Sept. | Patchy rain possible | 30° /21° | 1.2 mm | 7 | |
| 22 Sept. | Light rain | 29° /21° | 7.9 mm | 6 | |
| 23 Sept. | Light rain | 24° /20° | 8.1 mm | 6 | |
| 24 Sept. | Patchy rain possible | 26° /20° | 1.1 mm | 6 | |
| 25 Sept. | Light rain | 26° /20° | 3.3 mm | 7 | |
| 26 Sept. | Patchy rain possible | 27° /21° | 1.6 mm | 7 | |
| 27 Sept. | Patchy rain possible | 27° /20° | 0.5 mm | 8 | |
| 28 Sept. | Light rain shower | 23° /19° | 2.1 mm | 5 | |
| 29 Sept. | Patchy rain possible | 25° /20° | 0.4 mm | 6 | |
| 30 Sept. | Patchy rain possible | 27° /19° | 0.4 mm | 6 | |
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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 26° and lows near 19°, suitable for diverse activities and preferences.
How much rainfall should be expected in Rio de Janeiro during September?
Moderate rainfall is anticipated in Rio de Janeiro during September, with a total of 79.2 mm spread over approximately 9 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Rio de Janeiro during September?
The average wind speed in Rio de Janeiro during September is 19 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 19.9 °C. At the beginning of September temperatures are around 19.9 °C; by the end of the month they stay fairly steady and reach 20 °C.
- What is the water temperature in Rio de Janeiro in September?
- The average water temperature in Rio de Janeiro in September is 19.9 °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 💧
Typically, Rio de Janeiro has 9 rainy days in September with a total of 79.2 mm of rainfall.
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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