September
Weather in South America for September 2025
Your guide to South America weather in September - trends and predictions
Expect cooler weather in first days of September 2025 in South America with the forecast suggesting a temperature of 26.9 °C, lower than the historical average.
In general, the average temperature in South America at the beginning of September is 28 °C. As the month progressed, temperatures tended to remain steady, reaching an average of 28 °C by the end of September.
With an average of 5 rainy days, South America 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
South America Weather September
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Temperatures trend during September in South America
See the weather trend as well as the moving average line
September weather in South America day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Patchy rain possible | 26° /19° | 1.1 mm | 1.8 | |
| 2 Sept. |  Sunny | 27° /19° | 0 mm | 0.5 | |
| 3 Sept. | Sunny | 28° /19° | 0 mm | 7 | |
| 4 Sept. | Sunny | 29° /19° | 0 mm | 7 | |
| 5 Sept. | Sunny | 30° /19° | 0 mm | 7 | |
| 6 Sept. | Patchy rain possible | 31° /21° | 0.2 mm | 6 | |
| 7 Sept. | Patchy rain possible | 25° /20° | 1.1 mm | 6 | |
| 8 Sept. | Patchy rain possible | 26° /19° | 0.2 mm | 6 | |
| 9 Sept. | Sunny | 30° /19° | 0 mm | 7 | |
| 10 Sept. | Patchy rain possible | 30° /21° | 0.4 mm | 6 | |
| 11 Sept. | Patchy rain possible | 20° /18° | 1.6 mm | 5 | |
| 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 | |
| Next | |||||
Important Notice
Our weather forecast for South America 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 South America forecast closer to your planned date for the most up-to-date weather information.
Change Month
South America in September - FAQ
What are the expected maximum and minimum temperatures in South America 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 South America during September?
Expect minimal rainfall in South America 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 South America during September?
The average wind speed in South America during September is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in South America
Explore the daily rainfall trends and prepare for South Americas September weather 💧
UV exposure in South America during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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