Porto Alegre weather in March
March in Porto Alegre: warm, rainy, with clean air — a great time to visit.
#11 of 12 months in Porto Alegre · #435 of 897 destinations to visit in March · comfort 78/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Porto Alegre in March
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Porto Alegre climate normals — March
| Daytime high | 28°C / 83°F | 🌤 warm |
|---|---|---|
| Nighttime low | 20°C / 68°F | |
| Rainfall | 109 mm / 4.3 in | 🌧 rainy |
| Rainy days | 12 days | |
| Humidity | 78% | 💦 very humid |
| Dew point | 19°C / 67°F | |
| Sunshine | 9.5 h/day | |
| Daylight | 12.3 h | |
| Wind | 17 km/h / 11 mph | |
| Air quality (US AQI) | 45 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Porto Alegre in March — FAQ
- Is March a good time to visit Porto Alegre?
- March in Porto Alegre: warm, rainy, with clean air — a great time to visit. It ranks #11 of 12 months for Porto Alegre on SeasonMap's comfort score (78/100).
- What is the weather like in Porto Alegre in March?
- In March, Porto Alegre averages a daily high of 28.2°C and a low of 19.8°C, with about 108.8 mm of rain over roughly 12.4 rainy days.
- What is the air quality in Porto Alegre in March?
- Porto Alegre has a mean US Air Quality Index of about 45 in March.