Porto Alegre in August
In August, Porto Alegre averages 21°C (70°F) during the day and 12°C (53°F) at night, with around 13 days of rain (104 mm total).
High seasonConditions are comfortable for sightseeing without being sweltering. Plan for unsettled weather and bring rain gear.
August offers comfortable temperatures in Porto Alegre, with some rain to plan around.
How August compares to the rest of the year in Porto Alegre
August is in the middle of the year for warmth in Porto Alegre (9th of 12) and one of the driest months (12th of 12). Daytime temperature runs 3°C below the annual average (25°C). August runs 2°C warmer than July (20°C) and warms a further 1°C into September (22°C).
August sunrise & sunset in Porto Alegre
Times shown for Porto Alegre local time (America/Sao_Paulo), calculated for the 15th of August. They shift by a few minutes day to day across the month.
Photography light in Porto Alegre — August
Golden-hour and blue-hour windows for the 15th of August, in Porto Alegre's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Porto Alegre in August
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 August's tier (High season) and Porto Alegre's popularity.
Crowds & pricing — August in Porto Alegre
This is a busy month in Porto Alegre — not the absolute peak, but tourist numbers are clearly elevated. You'll feel it at headline attractions on weekends and in the historic centre, though side streets and lesser-known sights stay manageable. Prices are above off-season but not at their summit. A good week for first-time visitors who want everything open without the worst of the crush.
Why this tier: excellent tourism weather
Sun & mosquito risk — August 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 August weather
🌍 See the full ranked list of climate twins for Porto Alegre in August →
Frequently asked questions
How hot is Porto Alegre in August?
In August, Porto Alegre averages a high of 21°C (70°F) and a low of 12°C (53°F) — generally mild and pleasant.
Does it rain a lot in Porto Alegre in August?
August can be fairly wet in Porto Alegre, with about 13 rainy days on average.
Is August a good time to visit Porto Alegre?
August is mild and pleasant. It suits travelers who are comfortable with mild and pleasant weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Porto Alegre in August?
Pack light layers for warm days and cooler evenings, plus a compact umbrella or rain jacket. See the full August packing list for Porto Alegre for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.