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Porto Alegre Weather by Month
Average temperatures, rainfall and humidity for Porto Alegre, Brazil, month by month, built from OpenWeather’s historical records. Use it to see what a typical Porto Alegre month looks like before you travel — then check the live Porto Alegre forecast for the days ahead.
Warmest month
January
30°C average high
Coolest month
June
12°C average low
Wettest month
March
74 mm of rain
Driest month
February
43 mm of rain
Average temperature and rainfall in Porto Alegre by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 30°C | 19°C | -6°C / 39°C | 52 mm | 75% | 13 km/h |
| February | 29°C | 19°C | 0°C / 40°C | 43 mm | 76% | 13 km/h |
| March | 28°C | 18°C | 1°C / 38°C | 74 mm | 77% | 12 km/h |
| April | 25°C | 17°C | 6°C / 34°C | 51 mm | 78% | 12 km/h |
| May | 22°C | 14°C | 4°C / 33°C | 67 mm | 81% | 10 km/h |
| June | 21°C | 12°C | 0°C / 34°C | 63 mm | 80% | 10 km/h |
| July | 21°C | 12°C | -2°C / 38°C | 51 mm | 78% | 10 km/h |
| August | 23°C | 13°C | 0°C / 39°C | 51 mm | 77% | 10 km/h |
| September | 23°C | 15°C | 3°C / 37°C | 73 mm | 78% | 12 km/h |
| October | 24°C | 16°C | 5°C / 39°C | 60 mm | 78% | 13 km/h |
| November | 26°C | 16°C | -2°C / 39°C | 50 mm | 75% | 13 km/h |
| December | 28°C | 17°C | -3°C / 39°C | 46 mm | 75% | 13 km/h |
Best time to visit Porto Alegre
The most comfortable time to visit Porto Alegre is generally April, August and October, balancing mild daytime temperatures against the driest stretch of the year. The city has a moderate seasonal swing and rain concentrates around March, totalling about 682 mm a year.
Travellers who prefer heat should aim for January, when highs average 30°C. March is the month to avoid if rain would spoil your plans — it averages 74 mm, roughly 2× the rainfall of the driest month (February).
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Porto Alegre forecast for what is happening now.