Weather in Rio de Janeiro for September 2025
In general, the average temperature in Rio de Janeiro at the beginning of September is 26.4 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 28 °C by the end of September.
Rio de Janeiro sees moderate rainfall in September, averaging 8 rainy days.
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Rio de Janeiro in September average weather
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  27° | 2  26° | 3 26° | 4 29° | 5  29° | 6  22° | 7 26° |
| 8 29° | 9 28° | 10 28° | 11 30° | 12 31° | 13 32° | 14  31° |
| 15 23° | 16 26° | 17 25° | 18 27° | 19 27° | 20 27° | 21 28° |
| 22 29° | 23 28° | 24 31° | 25 29° | 26 30° | 27 33° | 28 22° |
| 29 24° | 30 27° |
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Temperatures trend during September in Rio de Janeiro
September weather day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Partly cloudy | 27° /18° | 0 mm | 8 | |
| 2 Sept. | Sunny | 26° /19° | 0.2 mm | 7 | |
| 3 Sept. | Sunny | 26° /20° | 0 mm | 8 | |
| 4 Sept. | Sunny | 29° /20° | 0 mm | 8 | |
| 5 Sept. | Light drizzle | 29° /20° | 0.6 mm | 7 | |
| 6 Sept. | Light rain shower | 22° /19° | 3.5 mm | 6 | |
| 7 Sept. | Patchy rain possible | 26° /19° | 0.4 mm | 7 | |
| 8 Sept. | Sunny | 29° /20° | 0 mm | 8 | |
| 9 Sept. | Sunny | 28° /20° | 0 mm | 8 | |
| 10 Sept. | Sunny | 28° /20° | 0 mm | 8 | |
| 11 Sept. | Sunny | 30° /21° | 0 mm | 8 | |
| 12 Sept. | Sunny | 31° /21° | 0 mm | 8 | |
| 13 Sept. | Sunny | 32° /22° | 0 mm | 9 | |
| 14 Sept. | Overcast | 31° /21° | 0 mm | 8 | |
| 15 Sept. | Overcast | 23° /19° | 1.9 mm | 6 | |
| 16 Sept. | Partly cloudy | 26° /18° | 1.3 mm | 7 | |
| 17 Sept. | Sunny | 25° /20° | 1.3 mm | 7 | |
| 18 Sept. | Sunny | 27° /20° | 0.3 mm | 7 | |
| 19 Sept. | Sunny | 27° /19° | 0 mm | 8 | |
| 20 Sept. | Sunny | 27° /20° | 0 mm | 8 | |
| 21 Sept. | Sunny | 28° /21° | 0.8 mm | 7 | |
| 22 Sept. | Sunny | 29° /21° | 0 mm | 8 | |
| 23 Sept. | Sunny | 28° /22° | 0 mm | 8 | |
| 24 Sept. | Sunny | 31° /22° | 0 mm | 8 | |
| 25 Sept. | Partly cloudy | 29° /22° | 0 mm | 8 | |
| 26 Sept. | Partly cloudy | 30° /22° | 0.2 mm | 8 | |
| 27 Sept. | Partly cloudy | 33° /22° | 0.5 mm | 9 | |
| 28 Sept. | Light rain shower | 22° /20° | 3.9 mm | 6 | |
| 29 Sept. | Patchy rain possible | 24° /19° | 0.3 mm | 6 | |
| 30 Sept. | Patchy rain possible | 27° /18° | 0 mm | 7 | |
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Guide for Rio de Janeiro in September
In September, Rio de Janeiro, Brazil experiences a transition from the tail end of winter to the beginning of spring. At the start of the month, the weather in Rio de Janeiro is generally mild and comfortable, with average temperatures ranging from 18° to 25°.
The city sees relatively low precipitation during this time, making it an ideal period for outdoor activities and sightseeing. However, occasional light showers can be expected, so it's advisable to carry an umbrella or light rain jacket.
As the month progresses, Rio de Janeiro begins to witness a gradual increase in temperatures, with averages climbing to around 20° to 28°. The city also experiences longer daylight hours, providing ample opportunities for beach visits and outdoor excursions.
The sea temperature also starts to rise, making it more inviting for swimming and water sports.
Overall, September in Rio de Janeiro offers pleasant weather conditions, making it a great time to explore the city's vibrant culture, stunning beaches, and lush landscapes. However, it's important to stay updated on the local weather forecasts, as occasional changes in weather patterns can occur.
Rio de Janeiro in September - FAQ
What to pack to Rio de Janeiro in September?
As you prepare for your trip to Rio de Janeiro in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Rio de Janeiro, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Lightweight Clothing: T-shirts, blouses, shorts, skirts
- Rain Gear: Lightweight, waterproof clothing
- Accessories
- Sunglasses: For sun protection
- Sun Hats: Wide-brimmed hats for sun protection in warm weather
- Umbrellas/Raincoats: For rainy days
- Personal Items
- Sunscreen: High SPF for sunny destinations
- Lip Balm with SPF: To protect against chapped lips
September rainfall patterns in Rio de Janeiro
UV exposure in Rio de Janeiro during September
Quick links
Where is Rio de Janeiro?Get accurate weather forecasts for Rio de Janeiro, located at latitude -22.906 and longitude -43.182. Stay updated with localized weather information tailored for Rio de Janeiro.