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With daytime temperatures of 22°C (72°F) and nighttime lows of 11°C (52°F), August in Porto Alegre brings high temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 123 mm (4.8 in) falls on average.
If you favor pleasant temperatures and minimal rainfall, August is one of the best months to visit Porto Alegre.
Pick a month to see the average temperature, rainfall and sunshine in Porto Alegre - and find the best time to visit.
50-year average (1976-2025)
Based on our historical records, temperatures in Porto Alegre typically stay consistent throughout August, with daily highs averaging around 22°C (72°F). Nights are cool, with lows typically ranging from 11°C (52°F) to 13°C (55°F).
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Browse day-by-day weather records for Porto Alegre spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Based on 50 years of weather observations in Porto Alegre between 1976 and 2026, these are the recorded extremes.
Find out more about the weather in Brazil and which places have the best travel conditions in this month. See all of Brazil in August →
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
For Porto Alegre in August, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. Bring sunglasses since you'll have some sunny periods throughout the month
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Porto Alegre climate overview or explore weather in Brazil.
Where to go in August - average daytime high across popular destinations.
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