Last updated: August 22, 2025
In December, the average temperature in San Justo, Argentina is a pleasant 23°C (73°F). Expect a range where the minimum can drop to 8°C (46°F), while highs can soar to 37°C (99°F). With an average precipitation of 67 mm (2.6 in) spread over 7 days, humidity sits comfortably at 56%, making it a month of interesting weather dynamics.
In December in San Justo, the average temperature is 23°C (73°F). Maximums can reach 37°C (99°F) and minimums can be as low as 8°C (46°F). This diverse temperature range makes San Justo an ideal destination for travelers looking to enjoy both warm and cool experiences during their visit.
In San Justo in December, the total precipitation amount is 67 mm (2.6 in) over a span of 7 days.
In San Justo in December, humidity is 56%. With an average temperature of 23°C (73°F), this humidity feels like a warm embrace that makes traveling feel slightly sticky, yet still comfortable enough to explore outdoors without feeling overwhelmed.
In San Justo 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 Justo, you can check here.
UV Risk Categories
Weather in San Justo varies notably across the year, with each month offering distinct climate conditions. This page compares December’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 |