Last updated: August 22, 2025
In December, the average temperature in Santa Maria, Brazil hovers around 24°C (76°F), providing a pleasant climate for exploration. However, be prepared for a temperature range that can dip as low as 10°C (50°F) and soar to a sizzling 39°C (102°F). Expect 72 mm (2.8 in) of precipitation over about 8 days, contributing to an average humidity of 85%. Whether you’re soaking up the sun or dodging the occasional shower, Santa Maria offers a unique experience this season!
In December in Santa Maria, the average temperature is 24°C (76°F). The maximum can reach 39°C (102°F) and the minimum can be as low as 10°C (50°F). This makes it an ideal time for travelers to enjoy warm days while also being prepared for cooler evenings.
In Santa Maria in December, the precipitation amount is 72 mm (2.8 in) over the course of 8 days.
In Santa Maria in December humidity is 85%. With an average temperature of 24°C (76°F), this humidity feels like walking through a warm, thick blanket that envelops you, making every step slightly more laborious and prompting a constant desire for refreshing coolness while exploring.
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 | 25°C (77°F) | 143 mm (5.6 inches) | 74% | extreme |
| February Weather | 24°C (75°F) | 107 mm (4.2 inches) | 73% | extreme |
| March Weather | 23°C (73°F) | 116 mm (4.6 inches) | 73% | extreme |
| April Weather | 20°C (69°F) | 79 mm (3.1 inches) | 81% | very high |
| May Weather | 16°C (61°F) | 200 mm (7.9 inches) | 87% | high |
| June Weather | 15°C (59°F) | 120 mm (4.7 inches) | 84% | moderate |
| July Weather | 14°C (57°F) | 106 mm (4.2 inches) | 80% | moderate |
| August Weather | 15°C (60°F) | 103 mm (4.1 inches) | 71% | high |
| September Weather | 17°C (64°F) | 148 mm (5.8 inches) | 74% | very high |
| October Weather | 19°C (67°F) | 168 mm (6.6 inches) | 77% | extreme |
| November Weather | 22°C (71°F) | 137 mm (5.4 inches) | 77% | extreme |
| December Weather | 24°C (76°F) | 72 mm (2.8 inches) | 85% | extreme |