December
Weather in South America for December 2025
Your guide to South America weather in December - trends and predictions
In general, the average temperature in South America at the beginning of December is 30.4 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 27.7 °C by the end of December.
South America experiences heavy rainfall in December, with over 20 rainy days and an average total precipitation 155.5 mm.
Temperatures
Rain 🌧️
8
Dry days
23
Rainy days
0
Snow days
29°/19°
Temperatures
19 km/h
Avg max wind
73 %
Avg humidity
South America Weather December
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Temperatures trend during December in South America
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December weather in South America day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Dec. |  Patchy rain possible | 33° /20° | 0.1 mm | 9 | |
| 2 Dec. |  Sunny | 33° /21° | 5.8 mm | 10 | |
| 3 Dec. | Sunny | 28° /21° | 12.6 mm | 8 | |
| 4 Dec. | Patchy rain possible | 27° /19° | 0.8 mm | 8 | |
| 5 Dec. | Light rain shower | 28° /18° | 2.8 mm | 8 | |
| 6 Dec. |  Patchy light rain | 31° /20° | 1.9 mm | 8 | |
| 7 Dec. | Patchy rain possible | 33° /21° | 11.5 mm | 9 | |
| 8 Dec. | Light rain shower | 30° /20° | 3.5 mm | 8 | |
| 9 Dec. | Patchy rain possible | 22° /19° | 8.4 mm | 7 | |
| 10 Dec. |  Moderate or heavy rain shower | 26° /19° | 16.6 mm | 8 | |
| 11 Dec. | Light rain shower | 26° /18° | 5 mm | 8 | |
| 12 Dec. | Patchy rain possible | 26° /17° | 0.3 mm | 8 | |
| 13 Dec. |  Partly cloudy | 30° /17° | 0.6 mm | 9 | |
| 14 Dec. | Partly cloudy | 28° /19° | 5 mm | 9 | |
| 15 Dec. | Sunny | 30° /20° | 1.6 mm | 9 | |
| 16 Dec. |  Patchy light rain with thunder | 32° /21° | 0.8 mm | 9 | |
| 17 Dec. | Patchy rain possible | 32° /19° | 0.8 mm | 9 | |
| 18 Dec. | Patchy rain possible | 32° /19° | 0.2 mm | 9 | |
| 19 Dec. | Patchy rain possible | 33° /19° | 0.1 mm | 9 | |
| 20 Dec. | Patchy rain possible | 29° /19° | 4.8 mm | 8 | |
| 21 Dec. | Patchy light drizzle | 30° /19° | 6.4 mm | 8 | |
| 22 Dec. | Patchy rain possible | 27° /19° | 2 mm | 7 | |
| 23 Dec. | Patchy rain possible | 29° /19° | 4.4 mm | 7 | |
| 24 Dec. | Moderate or heavy rain shower | 29° /18° | 1.9 mm | 7 | |
| 25 Dec. | Moderate or heavy rain shower | 31° /19° | 9.7 mm | 8 | |
| 26 Dec. | Light rain shower | 27° /20° | 18.6 mm | 7 | |
| 27 Dec. | Moderate or heavy rain shower | 25° /19° | 7 mm | 7 | |
| 28 Dec. | Moderate rain at times | 29° /18° | 5.4 mm | 7 | |
| 29 Dec. | Moderate or heavy rain shower | 29° /21° | 6.5 mm | 7 | |
| 30 Dec. |  Heavy rain at times | 26° /19° | 3.3 mm | 7 | |
| 31 Dec. | Moderate or heavy rain shower | 27° /18° | 7 mm | 7 | |
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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 29° and lows near 19°, suitable for diverse activities and preferences.
How much rainfall should be expected in South America during December?
Significant rainfall exceeding 155.5 mm is expected in South America during December, occurring over more than 23 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 19 km/h, suggesting breezy to windy conditions, depending on your activities.
December rainfall patterns in South America
Explore the daily rainfall trends and prepare for South Americas December weather 💧
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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