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Weather in São Paulo for September 2025

Your guide to São Paulo weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in São Paulo is cooler than usual, with temperatures averaging 26.4 °C, this is -3 °C below the typical seasonal average.

  • The forecast for the next days in São Paulo predicts a temperature of 24.6 °C, which is cooler than the historical average.

  • In general, the average temperature in São Paulo at the beginning of September is 28.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.7 °C by the end of September.

    • Rain 🌧️

  • With an average of 3 rainy days, São Paulo experiences minimal rainfall in September.

Average dry days
27
Dry days
Average rainy days
3
Rainy days
Average snowy days
0
Snow days
Average temperatures
31°/19°
Temperatures
Average wind speed
19 km/h
Avg max wind
Average humidity
52 %
Avg humidity

São Paulo Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Sunny
30°
2
Partly cloudy
30°
3
Sunny
32°
4
Sunny
33°
5
Light rain shower
29°
6
Patchy rain possible
20°
7
Cloudy
26°
8
Sunny
32°
9
Sunny
32°
10
Cloudy
30°
11
Sunny
33°
12
Sunny
30°
13
Sunny
31°
14
Partly cloudy
30°
15
Overcast
23°
16
Partly cloudy
27°
17
Partly cloudy
24°
18
Sunny
28°
19
Sunny
35°
20
Patchy rain possible
36°
21
Patchy rain possible
36°
22
Moderate rain
27°
23
Patchy rain possible
14°
24
Patchy rain possible
14°
25
Moderate rain
14°
26
Moderate rain
16°
27
Patchy rain possible
23°
28
Patchy rain possible
28°
29
Moderate rain
30°
30
Patchy rain possible
20°

Temperatures trend during September in São Paulo

See the weather trend as well as the moving average line

September weather in São Paulo day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Sunny
Sunny
 30° /16° 0 mm 8
2 Sept. Partly cloudy
Partly cloudy
 30° /17° 0 mm 8
3 Sept. Sunny
Sunny
 32° /17° 1 mm 8
4 Sept. Sunny
Sunny
 33° /19° 0.1 mm 9
5 Sept. Light rain shower
Light rain shower
 29° /16° 0.5 mm 8
6 Sept. Patchy rain possible
Patchy rain possible
 20° /15° 0.4 mm 5
7 Sept. Cloudy
Cloudy
 26° /15° 0.1 mm 7
8 Sept. Sunny
Sunny
 32° /18° 0 mm 8
9 Sept. Sunny
Sunny
 32° /19° 0 mm 9
10 Sept. Cloudy
Cloudy
 30° /17° 0 mm 8
11 Sept. Sunny
Sunny
 33° /17° 0 mm 9
12 Sept. Sunny
Sunny
 30° /18° 0 mm 8
13 Sept. Sunny
Sunny
 31° /18° 0 mm 8
14 Sept. Partly cloudy
Partly cloudy
 30° /16° 0 mm 8
15 Sept. Overcast
Overcast
 23° /16° 0.3 mm 6
16 Sept. Partly cloudy
Partly cloudy
 27° /15° 0.6 mm 7
17 Sept. Partly cloudy
Partly cloudy
 24° /16° 0 mm 2.2
18 Sept. Sunny
Sunny
 28° /16° 0 mm 2.3
19 Sept. Sunny
Sunny
 35° /17° 0 mm 2.3
20 Sept. Patchy rain possible
Patchy rain possible
 36° /22° 0.5 mm 2.2
21 Sept. Patchy rain possible
Patchy rain possible
 36° /23° 0.2 mm 0.5
22 Sept. Moderate rain
Moderate rain
 27° /16° 7.3 mm 6
23 Sept. Patchy rain possible
Patchy rain possible
 14° /13° 1.1 mm 4
24 Sept. Patchy rain possible
Patchy rain possible
 14° /13° 1.1 mm 4
25 Sept. Moderate rain
Moderate rain
 14° /14° 5.6 mm 4
26 Sept. Moderate rain
Moderate rain
 16° /14° 12 mm 4
27 Sept. Patchy rain possible
Patchy rain possible
 23° /15° 0.9 mm 5
28 Sept. Patchy rain possible
Patchy rain possible
 28° /16° 0.1 mm 6
29 Sept. Moderate rain
Moderate rain
 30° /18° 5.1 mm 6
30 Sept. Patchy rain possible
Patchy rain possible
 20° /18° 2.8 mm 5
Next
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.
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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 3 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.

September rainfall patterns in São Paulo

Explore the daily rainfall trends and prepare for São Paulos September weather 💧

UV exposure in São Paulo during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Get accurate weather forecasts for São Paulo, located at latitude -23.548 and longitude -46.636. Stay updated with localized weather information tailored for São Paulo.

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