Last updated: August 22, 2025
In San Javier, Argentina, the average temperature in December hovers around 25°C (78°F). Expect a range where the minimum dips to 11°C (53°F) and the maximum can soar to 38°C (100°F). Be prepared for 84 mm (3.3 in) of precipitation over about 10 days and an average humidity of 84%, making it a rather humid month.
In December in San Javier, the average temperature is 25°C (78°F), with maximums reaching 38°C (100°F) and minimums dropping as low as 11°C (53°F). This varied climate makes it an ideal time for travelers to enjoy both warm and cooler activities, so pack accordingly!
In San Javier in December, the precipitation amount is 84 mm (3.3 in) over a span of 10 days.
In San Javier in December, humidity is 84%. With an average temperature of 25°C (78°F), this humidity feels like a warm, muggy embrace that can be quite stifling for traveling, making you crave cool breezes and plenty of hydration as you explore.
In San Javier 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 Javier, you can check here.
UV Risk Categories
Weather in San Javier varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in San Javier, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 26°C (79°F) | 177 mm (7.0 inches) | 77% | extreme |
| February Weather | 25°C (77°F) | 112 mm (4.4 inches) | 71% | extreme |
| March Weather | 24°C (75°F) | 143 mm (5.6 inches) | 74% | extreme |
| April Weather | 21°C (70°F) | 122 mm (4.8 inches) | 82% | very high |
| May Weather | 18°C (64°F) | 203 mm (8.0 inches) | 82% | high |
| June Weather | 16°C (61°F) | 105 mm (4.2 inches) | 73% | moderate |
| July Weather | 15°C (60°F) | 101 mm (4.0 inches) | 67% | high |
| August Weather | 17°C (63°F) | 88 mm (3.5 inches) | 49% | high |
| September Weather | 20°C (68°F) | 117 mm (4.6 inches) | 54% | very high |
| October Weather | 22°C (71°F) | 175 mm (6.9 inches) | 58% | extreme |
| November Weather | 23°C (75°F) | 153 mm (6.0 inches) | 69% | extreme |
| December Weather | 25°C (78°F) | 84 mm (3.3 inches) | 84% | extreme |