Last updated: August 22, 2025
In September, the average temperature in San Antonio, Argentina hovers around 13°C (56°F), offering a delightful climate for outdoor activities. Expect a minimum of -2°C (28°F) and a maximum of 31°C (89°F), showcasing the variability of the season. With an average precipitation of 51 mm (2.0 in) spread over 9 days, it’s advisable to carry an umbrella. The average humidity level is a comfortable 51%, making it a great time to explore!
In September in San Antonio, the average temperature is 13°C (56°F). Maximum temperatures can reach 31°C (89°F), while minimums can drop as low as -2°C (28°F). Be prepared for a wide range of weather conditions for your travels!
In San Antonio in September, the total precipitation amount is 51 mm (2.0 in) spread over 9 days.
In San Antonio in September humidity is 51%. With an average temperature of 13°C (56°F), this humidity feels like a pleasant coolness that enhances the experience of traveling, making it a refreshing atmosphere for exploring the surroundings without feeling overwhelmed by heat.
In San Antonio in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in San Antonio.
UV Risk Categories
Weather in San Antonio varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in San Antonio, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 20°C (68°F) | 235 mm (9.3 inches) | 63% | extreme |
| February Weather | 19°C (66°F) | 210 mm (8.3 inches) | 66% | extreme |
| March Weather | 17°C (63°F) | 207 mm (8.1 inches) | 68% | extreme |
| April Weather | 15°C (60°F) | 181 mm (7.1 inches) | 83% | very high |
| May Weather | 11°C (53°F) | 97 mm (3.8 inches) | 82% | high |
| June Weather | 8°C (47°F) | 43 mm (1.7 inches) | 72% | moderate |
| July Weather | 8°C (46°F) | 26 mm (1.0 inches) | 57% | high |
| August Weather | 10°C (50°F) | 14 mm (0.5 inches) | 42% | high |
| September Weather | 13°C (56°F) | 51 mm (2.0 inches) | 51% | very high |
| October Weather | 16°C (61°F) | 103 mm (4.1 inches) | 47% | extreme |
| November Weather | 18°C (64°F) | 170 mm (6.7 inches) | 58% | extreme |
| December Weather | 19°C (66°F) | 230 mm (9.0 inches) | 61% | extreme |