Porto Alegre
December
Weather in Porto Alegre for December 2026
Your guide to Porto Alegre weather in December - trends and predictions
In general, the average temperature in Porto Alegre at the beginning of December is 29 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 30.4 °C by the end of December.
The climate of Porto Alegre in December is notably wet, with an average of 14 rainy days, and a total of 199.6 mm of precipitation.
Temperatures
Rain 🌧️
17
Dry days
14
Rainy days
0
Snow days
27°/18°
Temperatures
19 km/h
Avg max wind
71 %
Avg humidity
Porto Alegre Weather December
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Temperatures trend during December in Porto Alegre
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December weather in Porto Alegre day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Dec. |  Patchy light drizzle | 29° /18° | 3.4 mm | 10 | |
| 2 Dec. | Light drizzle | 26° /19° | 25.5 mm | 9 | |
| 3 Dec. |  Partly cloudy | 26° /17° | 0.1 mm | 10 | |
| 4 Dec. |  Sunny | 27° /17° | 0 mm | 10 | |
| 5 Dec. | Partly cloudy | 32° /17° | 0 mm | 11 | |
| 6 Dec. |  Patchy light rain with thunder | 35° /20° | 16 mm | 12 | |
| 7 Dec. | Patchy light drizzle | 28° /21° | 0.5 mm | 9 | |
| 8 Dec. | Light drizzle | 25° /18° | 2.5 mm | 9 | |
| 9 Dec. |  Patchy rain possible | 22° /17° | 6.8 mm | 8 | |
| 10 Dec. | Light drizzle | 22° /17° | 11.5 mm | 8 | |
| 11 Dec. | Patchy rain possible | 28° /16° | 0.1 mm | 10 | |
| 12 Dec. | Partly cloudy | 31° /18° | 0.8 mm | 11 | |
| 13 Dec. |  Heavy rain at times | 32° /19° | 18.9 mm | 10 | |
| 14 Dec. | Patchy light rain with thunder | 29° /19° | 16.9 mm | 10 | |
| 15 Dec. | Light drizzle | 28° /18° | 10.3 mm | 10 | |
| 16 Dec. | Light rain shower | 26° /18° | 5.5 mm | 9 | |
| 17 Dec. | Patchy rain possible | 25° /16° | 0.3 mm | 9 | |
| 18 Dec. | Partly cloudy | 30° /16° | 0 mm | 11 | |
| 19 Dec. | Patchy light drizzle | 32° /19° | 3.5 mm | 11 | |
| 20 Dec. | Patchy rain possible | 33° /19° | 0 mm | 11 | |
| 21 Dec. | Patchy rain possible | 29° /21° | 3.9 mm | 11 | |
| 22 Dec. |  Moderate or heavy rain shower | 26° /19° | 6.3 mm | 8 | |
| 23 Dec. | Sunny | 30° /20° | 1.6 mm | 9 | |
| 24 Dec. | Partly cloudy | 31° /20° | 4.6 mm | 10 | |
| 25 Dec. | Light rain shower | 28° /20° | 13.9 mm | 9 | |
| 26 Dec. | Partly cloudy | 29° /19° | 0.9 mm | 10 | |
| 27 Dec. | Partly cloudy | 34° /20° | 8.8 mm | 12 | |
| 28 Dec. | Sunny | 31° /20° | 20.1 mm | 10 | |
| 29 Dec. | Patchy rain possible | 28° /20° | 1.4 mm | 8 | |
| 30 Dec. |  Overcast | 30° /18° | 0 mm | 11 | |
| 31 Dec. | Partly cloudy | 33° /20° | 0.1 mm | 12 | |
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Important Notice
Our weather forecast for Porto Alegre 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 Porto Alegre forecast closer to your planned date for the most up-to-date weather information.
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Porto Alegre in December - FAQ
What are the expected maximum and minimum temperatures in Porto Alegre during December?
During December, expect a variety of temperatures with highs around 27° and lows near 18°, suitable for diverse activities and preferences.
How much rainfall should be expected in Porto Alegre during December?
Significant rainfall exceeding 199.6 mm is expected in Porto Alegre during December, occurring over more than 14 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Porto Alegre during December?
The average wind speed in Porto Alegre during December is 19 km/h, suggesting breezy to windy conditions, depending on your activities.
December rainfall patterns in Porto Alegre
Explore the daily rainfall trends and prepare for Porto Alegres December weather 💧
Typically, Porto Alegre has 14 rainy days in December with a total of 199.6 mm of rainfall.
UV exposure in Porto Alegre during December
Stay informed about UV levels for safe outdoor activities throughout the month of December ☀️
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