Last updated: August 22, 2025
In San Gustavo, Argentina, the average temperature in December is a pleasant 24°C (76°F), with a minimum dipping down to 10°C (50°F) and a maximum soaring up to 38°C (100°F). Expect 85 mm (3.3 in) of rainfall spread over 6 days, contributing to an average humidity of 68%.
In December in San Gustavo, the average temperature is 24°C (76°F). The maximum can reach 38°C (100°F) and the minimum can be as low as 10°C (50°F). This makes San Gustavo an ideal destination for travelers seeking warm weather while still having the option for cooler evenings.
In San Gustavo in December, the precipitation amount is 85 mm (3.3 in) over the course of 6 days.
In San Gustavo in December humidity is 68%. With an average temperature of 24°C (76°F), this humidity feels like a warm, steamy embrace that makes traveling both invigorating and slightly exhausting, as the air clings to your skin and encourages leisurely breaks in the shade.
In San Gustavo in December, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in San Gustavo, you can check here.
UV Risk Categories
Weather in San Gustavo varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in San Gustavo, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 26°C (79°F) | 109 mm (4.3 inches) | 59% | extreme |
| February Weather | 24°C (76°F) | 97 mm (3.8 inches) | 56% | extreme |
| March Weather | 22°C (73°F) | 89 mm (3.5 inches) | 69% | extreme |
| April Weather | 20°C (68°F) | 96 mm (3.8 inches) | 78% | very high |
| May Weather | 16°C (61°F) | 140 mm (5.5 inches) | 82% | high |
| June Weather | 13°C (56°F) | 82 mm (3.2 inches) | 81% | moderate |
| July Weather | 13°C (55°F) | 60 mm (2.3 inches) | 66% | moderate |
| August Weather | 14°C (58°F) | 93 mm (3.7 inches) | 54% | high |
| September Weather | 17°C (63°F) | 78 mm (3.1 inches) | 60% | very high |
| October Weather | 20°C (68°F) | 96 mm (3.8 inches) | 59% | extreme |
| November Weather | 23°C (73°F) | 74 mm (2.9 inches) | 57% | extreme |
| December Weather | 24°C (76°F) | 85 mm (3.3 inches) | 68% | extreme |