Last updated: August 31, 2025
In September, the average temperature in San Antonio, Paraguay typically hovers around 22°C (73°F). However, temperatures can vary significantly, with a minimum of 9°C (48°F) and a maximum soaring up to 41°C (106°F). Visitors should also be prepared for some rain, as the precipitation averages around 78 mm (3.1 in) over the course of 7 days. The region enjoys a pleasant average humidity of 46%, making for a comfortable climate overall.
In September in San Antonio, the average temperature is 22°C (73°F). The maximum can reach 41°C (106°F), while the minimum can drop as low as 9°C (48°F). This range makes San Antonio a destination where you can experience both warm days and cooler evenings, perfect for travelers who enjoy varied weather.
In San Antonio in September, the total precipitation amount is 78 mm (3.1 in) over a duration of 7 days.
In San Antonio in September, humidity is 46%. With an average temperature of 22°C (73°F), this humidity feels like a refreshing embrace, making it comfortable for traveling, allowing you to explore without feeling too hot or sticky.
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 | 28°C (83°F) | 130 mm (5.1 inches) | 80% | extreme |
| February Weather | 27°C (81°F) | 90 mm (3.6 inches) | 74% | extreme |
| March Weather | 26°C (79°F) | 107 mm (4.2 inches) | 75% | extreme |
| April Weather | 23°C (74°F) | 129 mm (5.1 inches) | 80% | very high |
| May Weather | 20°C (68°F) | 135 mm (5.3 inches) | 80% | high |
| June Weather | 18°C (65°F) | 78 mm (3.1 inches) | 67% | moderate |
| July Weather | 17°C (63°F) | 49 mm (1.9 inches) | 61% | high |
| August Weather | 19°C (67°F) | 54 mm (2.1 inches) | 40% | very high |
| September Weather | 22°C (73°F) | 78 mm (3.1 inches) | 46% | very high |
| October Weather | 24°C (76°F) | 199 mm (7.8 inches) | 49% | extreme |
| November Weather | 26°C (79°F) | 160 mm (6.3 inches) | 72% | extreme |
| December Weather | 27°C (81°F) | 110 mm (4.3 inches) | 82% | extreme |