Porto Alegre Weather in May
May in Porto Alegre brings high temperatures around 23°C (73°F) during the day, dropping to 13°C (55°F) at night, with the driest conditions of the year.
Rainfall in Porto Alegre in May
This month is perfect for exploring, with the driest conditions of the year. Expect around 14 days of rain based on historical data, with 110 mm (4.3 in) average. Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.
Temperature in Porto Alegre in May
Daytime highs in Porto Alegre in May reach 23°C (73°F), with nights around 13°C (55°F). This kind of day-to-night contrast is typical for this time of year. With overnight lows of 13°C (55°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.
Sunshine in Porto Alegre in May
The area enjoys a moderate level of sunlight, with around 145 hours. It's a good balance between sunny and cloudy days.
Wind Speed in Porto Alegre in May
May sees wind speeds averaging (). You'll typically experience very calm weather with minimal air movement throughout the month. Keep in mind this is an average. While most days are nearly windless, occasional windier days may still occur.If your ideal day consists of dry skies and pleasant temperatures, April, May, June, July, August, September, October and November typically offer the best circumstances for Porto Alegre.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Brazil, check out our Porto Alegre's climate page.
Porto Alegre Temperature in May
Min Temperature
13°C (55°F)
Max Temperature
23°C (73°F)
Chance of Rain
45%
Precipitation
110 mm (4.3 in)
Rainy days
14 days
Humidity
81%
Windspeed
()
Sunshine
145 hours
Percentage Sunshine
Daily Historical Temperatures
46-year average (1976-2025)
Based on our historical records, temperatures in Porto Alegre typically drop from around 24°C (75°F) at the start of May to approximately 20°C (68°F) by the end. Nights are cool, with lows typically ranging from 10°C (50°F) to 15°C (59°F).
Average temperatures in May
Daily Historical Precipitation
46-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather for Porto Alegre in May
Browse day-by-day weather records for Porto Alegre spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Porto Alegre historical weather extremes in May
The extremes listed below come from historical weather data collected in Porto Alegre from 2005 through 2025.
- The hottest May day on record in Porto Alegre reached 33°C (91°F) (May 6, 2024).
- The lowest daytime temperature in May was 11°C (52°F), recorded on May 29, 2007.
- The coldest night in May in Porto Alegre was on May 31, 2008, with a minimum of 3°C (37°F).
Best Places in Brazil in May
Find out more about the weather in Brazil and which places have the best travel conditions in this month. See all of Brazil in May →
perfect weather
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tolerable
unpleasant
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What to Wear in Porto Alegre in May
Pleasant temperatures in May mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Prepare for significant rainfall with proper waterproof clothing and shoes. Bring sunglasses since you'll have some sunny periods throughout the monthWhat To Do in Porto Alegre in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Brazil, check out our Porto Alegre's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Porto Alegre climate overview or explore weather in Brazil.
