Porto Alegre in December
In December, Porto Alegre averages 29°C (85°F) during the day and 20°C (67°F) at night, with frequent rain — about 17 days of the month see precipitation (113 mm total).
ShoulderConditions are warm and beach-friendly. Expect daily rain or showers, often in heavy bursts.
December offers comfortable temperatures in Porto Alegre, with some rain to plan around.
How December compares to the rest of the year in Porto Alegre
December is one of the warmest months in Porto Alegre (3rd of 12) and moderately rainy compared to the rest of the year (6th of 12). Daytime temperature runs 5°C above the annual average (25°C). December runs 3°C warmer than November (26°C) and warms a further 1°C into January (31°C).
December sunrise & sunset in Porto Alegre
Times shown for Porto Alegre local time (America/Sao_Paulo), calculated for the 15th of December. They shift by a few minutes day to day across the month.
Photography light in Porto Alegre — December
Golden-hour and blue-hour windows for the 15th of December, in Porto Alegre's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Porto Alegre in December
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on December's tier (Shoulder) and Porto Alegre's popularity.
Crowds & pricing — December in Porto Alegre
Porto Alegre is in a shoulder season month — fewer crowds, slightly lower prices, and a calmer atmosphere than peak weeks. Most major sights stay open with normal hours, though a handful of seasonal restaurants or boat trips may run reduced schedules. Many regulars consider these months the best time to visit because you trade a small amount of weather reliability for a much more pleasant on-the-ground experience.
Sun & mosquito risk — December in Porto Alegre
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Porto Alegre in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 31°C / 87°F | 21°C / 71°F | 116 mm | 21 | — |
| February | 30°C / 86°F | 21°C / 69°F | 89 mm | 18 | — |
| March | 28°C / 82°F | 20°C / 67°F | 125 mm | 20 | — |
| April | 25°C / 78°F | 17°C / 63°F | 75 mm | 16 | — |
| May | 21°C / 70°F | 13°C / 56°F | 150 mm | 15 | — |
| June | 19°C / 66°F | 11°C / 52°F | 145 mm | 13 | — |
| July | 20°C / 67°F | 11°C / 51°F | 136 mm | 13 | — |
| August | 21°C / 70°F | 12°C / 53°F | 104 mm | 13 | — |
| September | 22°C / 72°F | 14°C / 57°F | 170 mm | 17 | — |
| October | 24°C / 75°F | 16°C / 60°F | 155 mm | 19 | — |
| November | 26°C / 80°F | 17°C / 62°F | 126 mm | 16 | — |
| December | 29°C / 85°F | 20°C / 67°F | 113 mm | 17 | — |
Other cities with similar December weather
🌍 See the full ranked list of climate twins for Porto Alegre in December →
Frequently asked questions
How hot is Porto Alegre in December?
In December, Porto Alegre averages a high of 29°C (85°F) and a low of 20°C (67°F) — generally warm.
Does it rain a lot in Porto Alegre in December?
December is quite rainy in Porto Alegre, with about 17 rainy days on average.
Is December a good time to visit Porto Alegre?
December is warm but on the rainy side. It suits travelers who are comfortable with warm weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Porto Alegre in December?
Pack lightweight, breathable clothing, sunglasses and sunscreen, plus a compact umbrella or rain jacket. See the full December packing list for Porto Alegre for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.