Last updated: August 22, 2025
In September, the average temperature in San Justo, Argentina hovers around 14°C (58°F). However, be prepared for a temperature range that can swing from a chilly 1°C (34°F) to a warm 29°C (84°F). During this month, you can expect approximately 75 mm (3.0 in) of precipitation spread over about 6 days, while the average humidity sits at a comfortable 72%.
In September in San Justo, the average temperature is 14°C (58°F), with maximums reaching 29°C (84°F) and minimums dropping as low as 1°C (34°F). This diverse climate makes San Justo an ideal destination for travelers seeking both warm and cooler experiences.
In San Justo in September, the precipitation amount is 75 mm (3.0 in) occurring over a span of 6 days.
In San Justo in September, humidity is 72%. With an average temperature of 14°C (58°F), this humidity feels like a damp blanket wrapping around you, making walking and exploring slightly uncomfortable and requiring frequent breaks for hydration.
In San Justo 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 Justo.
UV Risk Categories
Weather in San Justo varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in San Justo, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 24°C (76°F) | 65 mm (2.6 inches) | 50% | extreme |
| February Weather | 23°C (74°F) | 66 mm (2.6 inches) | 61% | extreme |
| March Weather | 21°C (70°F) | 73 mm (2.9 inches) | 66% | extreme |
| April Weather | 18°C (65°F) | 80 mm (3.2 inches) | 80% | high |
| May Weather | 14°C (58°F) | 67 mm (2.7 inches) | 85% | moderate |
| June Weather | 11°C (53°F) | 56 mm (2.2 inches) | 80% | moderate |
| July Weather | 10°C (51°F) | 55 mm (2.2 inches) | 69% | moderate |
| August Weather | 12°C (54°F) | 46 mm (1.8 inches) | 66% | high |
| September Weather | 14°C (58°F) | 75 mm (3.0 inches) | 72% | very high |
| October Weather | 17°C (62°F) | 94 mm (3.7 inches) | 63% | very high |
| November Weather | 20°C (69°F) | 71 mm (2.8 inches) | 59% | extreme |
| December Weather | 23°C (73°F) | 67 mm (2.6 inches) | 56% | extreme |