São Paulo
September
Weather in São Paulo for September 2025
Your guide to São Paulo weather in September - trends and predictions
In general, the average temperature in São Paulo at the beginning of September is 30 °C. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 32.6 °C by the end of September.
São Paulo sees moderate rainfall in September, averaging 6 rainy days.
Is September a good time to visit São Paulo? check out the best time to travel to São Paulo page.
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24
Dry days
6
Rainy days
0
Snow days
31°/19°
Temperatures
19 km/h
Avg max wind
54 %
Avg humidity
São Paulo in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  31° | 2  31° | 3  33° | 4 35° | 5 29° | 6  21° | 7  30° |
| 8 32° | 9 33° | 10 32° | 11 33° | 12 34° | 13 35° | 14 31° |
| 15 21° | 16 25° | 17 26° | 18 29° | 19 31° | 20 34° | 21 32° |
| 22 35° | 23 35° | 24 37° | 25 36° | 26 38° | 27 37° | 28 20° |
| 29 28° | 30 32° |
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Temperatures trend during September in São Paulo
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Sunny | 31° /17° | 0 mm | 8 | |
| 2 Sept. | Partly cloudy | 31° /18° | 0 mm | 9 | |
| 3 Sept. | Patchy rain possible | 33° /18° | 1.5 mm | 8 | |
| 4 Sept. | Sunny | 35° /20° | 0.1 mm | 9 | |
| 5 Sept. | Light rain shower | 29° /16° | 0.8 mm | 8 | |
| 6 Sept. | Overcast | 21° /16° | 0.4 mm | 5 | |
| 7 Sept. | Cloudy | 30° /16° | 0.1 mm | 8 | |
| 8 Sept. | Sunny | 32° /19° | 0 mm | 9 | |
| 9 Sept. | Sunny | 33° /20° | 0 mm | 9 | |
| 10 Sept. | Cloudy | 32° /19° | 0 mm | 8 | |
| 11 Sept. | Sunny | 33° /19° | 0 mm | 9 | |
| 12 Sept. | Sunny | 34° /20° | 0 mm | 9 | |
| 13 Sept. | Sunny | 35° /21° | 0 mm | 9 | |
| 14 Sept. | Partly cloudy | 31° /18° | 0 mm | 9 | |
| 15 Sept. | Overcast | 21° /16° | 0.4 mm | 6 | |
| 16 Sept. | Partly cloudy | 25° /15° | 0.5 mm | 7 | |
| 17 Sept. | Sunny | 26° /18° | 0.6 mm | 7 | |
| 18 Sept. | Sunny | 29° /18° | 0.7 mm | 8 | |
| 19 Sept. | Partly cloudy | 31° /19° | 0.2 mm | 8 | |
| 20 Sept. | Sunny | 34° /19° | 0.1 mm | 9 | |
| 21 Sept. | Sunny | 32° /19° | 0.1 mm | 8 | |
| 22 Sept. | Sunny | 35° /20° | 0 mm | 9 | |
| 23 Sept. | Sunny | 35° /21° | 0 mm | 10 | |
| 24 Sept. | Sunny | 37° /22° | 0 mm | 10 | |
| 25 Sept. | Sunny | 36° /21° | 0 mm | 9 | |
| 26 Sept. | Partly cloudy | 38° /21° | 0 mm | 10 | |
| 27 Sept. | Patchy rain possible | 37° /17° | 0.9 mm | 9 | |
| 28 Sept. | Patchy rain possible | 20° /15° | 0.5 mm | 5 | |
| 29 Sept. | Patchy rain possible | 28° /16° | 0.1 mm | 7 | |
| 30 Sept. | Patchy rain possible | 32° /16° | 1.3 mm | 8 | |
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Important Notice
Our weather forecast for São Paulo 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 São Paulo forecast closer to your planned date for the most up-to-date weather information.
São Paulo in September - FAQ
What are the expected maximum and minimum temperatures in São Paulo during September?
Expect warm days with temperatures around 31°, cooling to mild conditions of 19° after sunset. Perfect for those who enjoy warm weather.
How much rainfall should be expected in São Paulo during September?
Rainfall in São Paulo during September is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 6 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.
What are the typical wind conditions in São Paulo during September?
The average wind speed in São Paulo during September is 19 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to São Paulo in September?
As you prepare for your trip to São Paulo 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 São Paulo, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Lightweight Clothing: T-shirts, blouses, shorts, skirts
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Sandals/Flip-flops: Comfortable for warm climates
- 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
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