Rio de Janeiro
December
Weather in Rio de Janeiro for December 2025
Your guide to Rio de Janeiro weather in December - trends and predictions
Until now, December 2025 in Rio de Janeiro has been nearly identical to the historical average, with a temperature of 28.4 °C (showing only a slight deviation of 0.5 °C).
The forecast for the upcoming days in Rio de Janeiro predicts a temperature of 30.1 °C, which is slightly above the historical average.
In general, the average temperature in Rio de Janeiro at the beginning of December is 28.1 °C. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 30.4 °C by the end of December.
Rio de Janeiro 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
Rio de Janeiro Weather December
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Temperatures trend during December in Rio de Janeiro
See the weather trend as well as the moving average line
December weather in Rio de Janeiro 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. |  Partly cloudy | 26° /21° | 2.3 mm | 8 | |
| 14 Dec. |  Sunny | 27° /21° | 2.8 mm | 8 | |
| 15 Dec. | Patchy rain possible | 31° /22° | 1.6 mm | 9 | |
| 16 Dec. | Patchy rain possible | 34° /24° | 2 mm | 3.6 | |
| 17 Dec. |  Moderate rain | 23° /21° | 19.2 mm | 0.5 | |
| 18 Dec. | Patchy rain possible | 25° /21° | 0.7 mm | 3.1 | |
| 19 Dec. | Patchy rain possible | 27° /21° | 2.7 mm | 2.8 | |
| 20 Dec. | Patchy rain possible | 28° /21° | 0.7 mm | 1.3 | |
| 21 Dec. | Patchy rain possible | 29° /22° | 1 mm | 8 | |
| 22 Dec. | Sunny | 30° /21° | 0 mm | 10 | |
| 23 Dec. | Sunny | 32° /23° | 0 mm | 10 | |
| 24 Dec. | Sunny | 33° /24° | 0 mm | 10 | |
| 25 Dec. | Patchy rain possible | 34° /24° | 0.2 mm | 9 | |
| 26 Dec. | Patchy rain possible | 32° /24° | 0.2 mm | 9 | |
| 27 Dec. | Patchy rain possible | 34° /24° | 1 mm | 9 | |
| 28 Dec. | Patchy rain possible | 30° /24° | 0.7 mm | 9 | |
| 29 Dec. | Patchy rain possible | 30° /24° | 1.2 mm | 9 | |
| 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 Rio de Janeiro 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 Rio de Janeiro forecast closer to your planned date for the most up-to-date weather information.
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Rio de Janeiro in December - FAQ
What are the expected maximum and minimum temperatures in Rio de Janeiro 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 Rio de Janeiro during December?
Significant rainfall exceeding 148.7 mm is expected in Rio de Janeiro during December, occurring over more than 26 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Rio de Janeiro during December?
The average wind speed in Rio de Janeiro during December is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
Rio de Janeiro water temperatures in December
The average water temperature of the Atlantic Ocean near Rio de Janeiro in December is 21.8 °C. Temperatures remain fairly consistent throughout the month.
- What is the water temperature in Rio de Janeiro in December?
- The average water temperature in Rio de Janeiro in December is 21.8 °C.
- Can you swim in Rio de Janeiro in December?
- Comfortably warm for most people. Sensitive swimmers might prefer a light rash-guard, but wetsuits are rarely needed.
December rainfall patterns in Rio de Janeiro
Explore the daily rainfall trends and prepare for Rio de Janeiros December weather 💧
Typically, Rio de Janeiro has 26 rainy days in December with a total of 148.7 mm of rainfall.
UV exposure in Rio de Janeiro during December
Stay informed about UV levels for safe outdoor activities throughout the month of December ☀️
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