Last updated: August 28, 2025
In September, the average temperature in San Javier, Uruguay is a pleasant 16°C (61°F). Temperatures can occasionally dip to a chilly 1°C (35°F) or soar to a warm 32°C (90°F). With 98 mm (3.9 in) of precipitation spread over 6 days, expect a refreshing, albeit humid month with an average humidity of 70%.
In September in San Javier, the average temperature is 16°C (61°F). Maximum temperatures can reach up to 32°C (90°F), while minimums can drop as low as 1°C (35°F). Be prepared for a wide range of temperatures when traveling during this time!
In San Javier in September, the precipitation amount is 98 mm (3.9 in) over a span of 6 days.
In San Javier in September humidity is 70%. With an average temperature of 16°C (61°F), this humidity feels like a warm, damp blanket wrapping around you, making travel somewhat uncomfortable as you navigate the sticky air while trying to enjoy your surroundings.
In San Javier in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in San Javier.
UV Risk Categories
Weather in San Javier varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in San Javier, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 25°C (78°F) | 119 mm (4.7 inches) | 54% | extreme |
| February Weather | 24°C (75°F) | 92 mm (3.6 inches) | 61% | extreme |
| March Weather | 22°C (72°F) | 91 mm (3.6 inches) | 69% | extreme |
| April Weather | 19°C (67°F) | 89 mm (3.5 inches) | 79% | very high |
| May Weather | 15°C (59°F) | 93 mm (3.7 inches) | 85% | moderate |
| June Weather | 13°C (55°F) | 69 mm (2.7 inches) | 82% | moderate |
| July Weather | 12°C (53°F) | 55 mm (2.2 inches) | 69% | moderate |
| August Weather | 13°C (56°F) | 83 mm (3.3 inches) | 65% | high |
| September Weather | 16°C (61°F) | 98 mm (3.9 inches) | 70% | very high |
| October Weather | 18°C (65°F) | 102 mm (4.0 inches) | 63% | extreme |
| November Weather | 22°C (72°F) | 69 mm (2.7 inches) | 60% | extreme |
| December Weather | 24°C (75°F) | 115 mm (4.5 inches) | 63% | extreme |