Monthly climate guide
Porto Alegre weather in May
Expect warm weather in Porto Alegre in May: afternoons reach about 22°C (72°F), while nights drop to around 13°C (55°F). Around 110 mm of rain falls over the month (wet), and skies are often cloudy. Daytime highs are 4°C cooler than April and 3°C warmer than June.
What stands out in May
- Porto Alegre is usually about 2°C warmer than Caxias do Sul, 100 km away, in May.
- In Porto Alegre, May is late autumn — the seasons are reversed south of the equator.
Avg high
22°C
72°F
Avg low
13°C
55°F
Rainfall
110 mm
wet
Humidity
83%
relative
Sky
62%
cloud · often cloudy
Porto Alegre weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 30°C / 85°F | 20°C / 68°F | 117 mm | 79% | 59% |
| February | 30°C / 86°F | 20°C / 69°F | 102 mm | 77% | 54% |
| March | 28°C / 83°F | 18°C / 65°F | 110 mm | 78% | 55% |
| April | 26°C / 79°F | 16°C / 61°F | 101 mm | 80% | 58% |
| May | 22°C / 72°F | 13°C / 55°F | 110 mm | 83% | 62% |
| June | 20°C / 67°F | 10°C / 50°F | 114 mm | 85% | 62% |
| July | 19°C / 66°F | 9°C / 49°F | 160 mm | 86% | 59% |
| August | 21°C / 70°F | 11°C / 51°F | 122 mm | 85% | 56% |
| September | 22°C / 72°F | 13°C / 55°F | 143 mm | 84% | 62% |
| October | 24°C / 76°F | 15°C / 58°F | 168 mm | 83% | 64% |
| November | 26°C / 79°F | 16°C / 60°F | 100 mm | 80% | 52% |
| December | 29°C / 83°F | 18°C / 65°F | 111 mm | 79% | 55% |
What to pack for May
- T-shirts plus a light layer for the evening
- Comfortable trainers or sandals for long walks
- A compact umbrella or packable rain jacket
- Water-resistant shoes
Is May a good time to visit Porto Alegre?
Compare the months in the chart above to find your ideal window.
Best time to visit Porto Alegre →Other Brazil cities in May
Cite or embed this data
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Porto Alegre weather in May. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/brazil/porto-alegre/may
<a href="https://weathercompare.eu/weather/brazil/porto-alegre/may">Porto Alegre weather in May</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/brazil/porto-alegre" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Porto Alegre weather in May"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/brazil/porto-alegre/may">Porto Alegre weather in May</a> – WeatherCompare</p>
Porto Alegre in May: quick answers
Is May a good time to visit Porto Alegre?
Yes. May is one of the best months for Porto Alegre, with highs around 22°C and about 110 mm of rain.
How warm is Porto Alegre in May?
Average highs are about 22°C (72°F) and average lows about 13°C (55°F), based on 10 years of daily data.
Does it rain a lot in Porto Alegre in May?
Porto Alegre typically gets around 110 mm of rain in May — wet.
Figures are long-term averages for the area around Porto Alegre (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.