Porto Alegre weather in August
August in Porto Alegre: nice, rainy, with clean air — an excellent time to visit.
#3 of 12 months in Porto Alegre · #326 of 897 destinations to visit in August · comfort 86/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Porto Alegre in August
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Porto Alegre climate normals — August
| Daytime high | 21°C / 70°F | 😎 nice |
|---|---|---|
| Nighttime low | 11°C / 52°F | |
| Rainfall | 88 mm / 3.5 in | 🌧 rainy |
| Rainy days | 8 days | |
| Humidity | 80% | 💦 very humid |
| Dew point | 11°C / 53°F | |
| Sunshine | 8 h/day | |
| Daylight | 11.1 h | |
| Wind | 16 km/h / 10 mph | |
| Air quality (US AQI) | 48 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Porto Alegre in August — FAQ
- Is August a good time to visit Porto Alegre?
- August in Porto Alegre: nice, rainy, with clean air — an excellent time to visit. It ranks #3 of 12 months for Porto Alegre on SeasonMap's comfort score (86/100).
- What is the weather like in Porto Alegre in August?
- In August, Porto Alegre averages a daily high of 20.9°C and a low of 11°C, with about 88.4 mm of rain over roughly 8.4 rainy days.
- What is the air quality in Porto Alegre in August?
- Porto Alegre has a mean US Air Quality Index of about 48 in August.