Porto Alegre weather in May
Temperature, sea and sunshine in May: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in May
Good
Best time to visit: February – December
What is the weather like in Porto Alegre in May?
In May, Porto Alegre is mild: daytime highs average 21 °C, and nights cool down to about 13 °C. The sea averages 19.3 °C – bracing, so a wetsuit helps for longer swims. Expect around 5 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 117 mm in total. All in all, May is a good month for a holiday in Porto Alegre.
May compared
How the weather changes from April to June. Tap a month to open it.
More details for May
- Daylight
- 10 h 38 min07:02 – 17:40
- UV index
- 4 · moderateclear sky, noon (estimate)All months
- Muggy days
- 3 daysdew point 18 °C or moreAll months
- Wind
- 15 km/haverage daily peakAll months
- Cloud cover
- 60 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC−3America/Sao_Paulo
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %27 %
- Few rainy daysweight 30 %60 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in May
- Wetsuit for longer swims
- Sunscreen
- A jumper for the evenings
- Rain jacket or umbrella
Porto Alegre in May: quick answers
Is Porto Alegre hot in May?
No. In May, Porto Alegre is mild: daytime highs average 21 °C and nights drop to about 13 °C.
Can you swim in Porto Alegre in May?
Only if you don't mind cold water: in May the sea averages just 19.3 °C. Comfortable swimming is possible from November to April.
Does it rain much in Porto Alegre in May?
Rain is frequent, with about 10 rainy days and 117 mm in total.
Porto Alegre month by month
The whole year in Porto AlegreAll destinations: BrazilWhere to go in MaySea temperature in May
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences