December
Weather in South America for December 2025
Your guide to South America weather in December - trends and predictions
Until now, December 2025 in South America has been nearly identical to the historical average, with a temperature of 28.7 °C (showing only a slight deviation of 0.5 °C).
The forecast for the upcoming days in South America predicts a temperature of 29.7 °C, which is slightly above the historical average.
In general, the average temperature in South America at the beginning of December is 28.1 °C. As the month progressed, temperatures tended to slightly increase, reaching an average of 28.6 °C by the end of December.
South America experiences heavy rainfall in December, with over 20 rainy days and an average total precipitation 148.7 mm.
Temperatures
Rain 🌧️
5
Dry days
26
Rainy days
0
Snow days
28°/22°
Temperatures
15 km/h
Avg max wind
81 %
Avg humidity
South America Weather December
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Temperatures trend during December in South America
See the weather trend as well as the moving average line
December weather in South America day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Dec. |  Patchy rain possible | 27° /22° | 2.8 mm | 8 | |
| 2 Dec. | Patchy rain possible | 31° /22° | 4.1 mm | 9 | |
| 3 Dec. | Patchy rain possible | 27° /22° | 6.9 mm | 8 | |
| 4 Dec. | Light rain shower | 26° /22° | 23.4 mm | 8 | |
| 5 Dec. | Light rain shower | 26° /21° | 7 mm | 8 | |
| 6 Dec. | Patchy rain possible | 29° /22° | 0.6 mm | 9 | |
| 7 Dec. | Patchy rain possible | 31° /22° | 0.5 mm | 9 | |
| 8 Dec. | Patchy rain possible | 30° /23° | 1.3 mm | 9 | |
| 9 Dec. | Light rain shower | 28° /22° | 4 mm | 8 | |
| 10 Dec. | Patchy rain possible | 28° /22° | 4.8 mm | 8 | |
| 11 Dec. | Light rain shower | 27° /21° | 5.6 mm | 8 | |
| 12 Dec. | Patchy rain possible | 27° /21° | 2.3 mm | 8 | |
| 13 Dec. |  Heavy rain | 30° /23° | 20.5 mm | 1.5 | |
| 14 Dec. | Patchy rain possible | 25° /23° | 1.3 mm | 0.8 | |
| 15 Dec. | Patchy rain possible | 32° /23° | 2.1 mm | 3.4 | |
| 16 Dec. |  Moderate rain | 33° /23° | 10.8 mm | 2.8 | |
| 17 Dec. | Patchy rain possible | 26° /21° | 2 mm | 0.4 | |
| 18 Dec. |  Partly cloudy | 25° /21° | 0 mm | 9 | |
| 19 Dec. | Patchy rain possible | 26° /21° | 0.2 mm | 8 | |
| 20 Dec. | Patchy rain possible | 28° /22° | 0.2 mm | 8 | |
| 21 Dec. | Partly cloudy | 29° /22° | 0 mm | 10 | |
| 22 Dec. | Patchy rain possible | 31° /22° | 0.6 mm | 9 | |
| 23 Dec. |  Sunny | 34° /23° | 0 mm | 10 | |
| 24 Dec. | Patchy rain possible | 35° /24° | 3.4 mm | 9 | |
| 25 Dec. | Patchy rain possible | 33° /23° | 0.3 mm | 9 | |
| 26 Dec. | Patchy rain possible | 29° /24° | 1.4 mm | 9 | |
| 27 Dec. |  Moderate or heavy rain shower | 27° /22° | 8.1 mm | 7 | |
| 28 Dec. | Patchy rain possible | 29° /22° | 3.1 mm | 7 | |
| 29 Dec. | Moderate or heavy rain shower | 29° /22° | 5.3 mm | 8 | |
| 30 Dec. | Moderate or heavy rain shower | 27° /22° | 9.7 mm | 7 | |
| 31 Dec. | Light rain shower | 26° /21° | 3.5 mm | 7 | |
| Next | |||||
Important Notice
Our weather forecast for South America in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the South America forecast closer to your planned date for the most up-to-date weather information.
Change Month
South America in December - FAQ
What are the expected maximum and minimum temperatures in South America during December?
During December, expect a variety of temperatures with highs around 28° and lows near 22°, suitable for diverse activities and preferences.
How much rainfall should be expected in South America during December?
Significant rainfall exceeding 148.7 mm is expected in South America during December, occurring over more than 26 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in South America during December?
The average wind speed in South America during December is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
South America water temperatures in December
The average water temperature of the Atlantic Ocean near South America in December is 21.9 °C. Temperatures remain fairly consistent throughout the month.
- What is the water temperature in South America in December?
- The average water temperature in South America in December is 21.9 °C.
- Can you swim in South America in December?
- Comfortably warm for most people. Sensitive swimmers might prefer a light rash-guard, but wetsuits are rarely needed.
December rainfall patterns in South America
Explore the daily rainfall trends and prepare for South Americas December weather 💧
Typically, South America has 26 rainy days in December with a total of 148.7 mm of rainfall.
UV exposure in South America during December
Stay informed about UV levels for safe outdoor activities throughout the month of December ☀️
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