Last updated: August 22, 2025
In December, the average temperature in Santa Maria, Argentina reaches a pleasant 26°C (79°F). However, temperatures can vary significantly, with minimums dipping to 12°C (53°F) and maximums soaring to 39°C (102°F). Expect a moderate amount of precipitation, averaging 78 mm (3.1 in) over 9 days, accompanied by a high average humidity of 81%.
In December in Santa Maria, the average temperature is 26°C (79°F). Maximum temperatures can reach up to 39°C (102°F), while minimum temperatures can drop as low as 12°C (53°F). Be prepared for a warm climate with occasional cool evenings when traveling to Santa Maria during this month.
In Santa Maria in December, the precipitation amount is 78 mm (3.1 in) over the course of 9 days.
In Santa Maria in December, humidity is 81%. With an average temperature of 26°C (79°F), this humidity feels like a warm, heavy blanket wrapping around you, making outdoor adventures stickier and more draining, yet still vibrant with life—perfect for exploring local culture, but you'll want to take frequent breaks and stay hydrated.
In Santa Maria 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 Santa Maria, you can check here.
UV Risk Categories
Weather in Santa Maria varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Santa Maria, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 27°C (80°F) | 171 mm (6.8 inches) | 70% | extreme |
| February Weather | 26°C (78°F) | 99 mm (3.9 inches) | 66% | extreme |
| March Weather | 24°C (76°F) | 137 mm (5.4 inches) | 73% | extreme |
| April Weather | 21°C (71°F) | 115 mm (4.5 inches) | 81% | very high |
| May Weather | 18°C (64°F) | 188 mm (7.4 inches) | 82% | high |
| June Weather | 16°C (62°F) | 105 mm (4.1 inches) | 77% | moderate |
| July Weather | 15°C (60°F) | 99 mm (3.9 inches) | 69% | moderate |
| August Weather | 17°C (63°F) | 83 mm (3.3 inches) | 51% | high |
| September Weather | 20°C (68°F) | 106 mm (4.2 inches) | 59% | very high |
| October Weather | 22°C (72°F) | 149 mm (5.9 inches) | 63% | extreme |
| November Weather | 24°C (75°F) | 148 mm (5.8 inches) | 66% | extreme |
| December Weather | 26°C (79°F) | 78 mm (3.1 inches) | 81% | extreme |