Weatheo

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

September

77 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.

MonthAvg highAvg lowRecord low / highRainfallHumidityWind
January30°C19°C-6°C / 39°C
52 mm
75%13 km/h
February29°C19°C0°C / 40°C
43 mm
76%13 km/h
March28°C18°C1°C / 38°C
74 mm
77%12 km/h
April25°C17°C6°C / 34°C
51 mm
78%12 km/h
May22°C14°C4°C / 33°C
67 mm
81%10 km/h
June21°C12°C0°C / 34°C
63 mm
80%10 km/h
July21°C12°C-2°C / 38°C
51 mm
78%10 km/h
August23°C13°C0°C / 39°C
51 mm
77%10 km/h
September23°C14°C3°C / 37°C
77 mm
78%12 km/h
October24°C16°C5°C / 39°C
62 mm
79%13 km/h
November26°C16°C-2°C / 39°C
50 mm
75%13 km/h
December28°C17°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 September, totalling about 687 mm a year.

Travellers who prefer heat should aim for January, when highs average 30°C. September is the month to avoid if rain would spoil your plans — it averages 77 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.

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