Porto Alegre in May
In May, Porto Alegre averages 21°C (70°F) during the day and 13°C (56°F) at night, with frequent rain — about 15 days of the month see precipitation (150 mm total).
High seasonConditions are comfortable for sightseeing without being sweltering. Plan for unsettled weather and bring rain gear.
May offers comfortable temperatures in Porto Alegre, with some rain to plan around.
How May compares to the rest of the year in Porto Alegre
May is one of the coolest months in Porto Alegre (10th of 12) and moderately rainy compared to the rest of the year (9th of 12). Daytime temperature runs 4°C below the annual average (25°C). May runs 4°C cooler than April (25°C) and cools 2°C in June (19°C).
May sunrise & sunset in Porto Alegre
Times shown for Porto Alegre local time (America/Sao_Paulo), calculated for the 15th of May. They shift by a few minutes day to day across the month.
Photography light in Porto Alegre — May
Golden-hour and blue-hour windows for the 15th of May, in Porto Alegre's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Porto Alegre in May
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on May's tier (High season) and Porto Alegre's popularity.
Crowds & pricing — May in Porto Alegre
This is a busy month in Porto Alegre — not the absolute peak, but tourist numbers are clearly elevated. You'll feel it at headline attractions on weekends and in the historic centre, though side streets and lesser-known sights stay manageable. Prices are above off-season but not at their summit. A good week for first-time visitors who want everything open without the worst of the crush.
Why this tier: excellent tourism weather
Sun & mosquito risk — May in Porto Alegre
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Porto Alegre in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 31°C / 87°F | 21°C / 71°F | 116 mm | 21 | — |
| February | 30°C / 86°F | 21°C / 69°F | 89 mm | 18 | — |
| March | 28°C / 82°F | 20°C / 67°F | 125 mm | 20 | — |
| April | 25°C / 78°F | 17°C / 63°F | 75 mm | 16 | — |
| May | 21°C / 70°F | 13°C / 56°F | 150 mm | 15 | — |
| June | 19°C / 66°F | 11°C / 52°F | 145 mm | 13 | — |
| July | 20°C / 67°F | 11°C / 51°F | 136 mm | 13 | — |
| August | 21°C / 70°F | 12°C / 53°F | 104 mm | 13 | — |
| September | 22°C / 72°F | 14°C / 57°F | 170 mm | 17 | — |
| October | 24°C / 75°F | 16°C / 60°F | 155 mm | 19 | — |
| November | 26°C / 80°F | 17°C / 62°F | 126 mm | 16 | — |
| December | 29°C / 85°F | 20°C / 67°F | 113 mm | 17 | — |
Other cities with similar May weather
🌍 See the full ranked list of climate twins for Porto Alegre in May →
Frequently asked questions
How hot is Porto Alegre in May?
In May, Porto Alegre averages a high of 21°C (70°F) and a low of 13°C (56°F) — generally mild and pleasant.
Does it rain a lot in Porto Alegre in May?
May is quite rainy in Porto Alegre, with about 15 rainy days on average.
Is May a good time to visit Porto Alegre?
May is mild and pleasant but on the rainy side. It suits travelers who are comfortable with mild and pleasant weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Porto Alegre in May?
Pack light layers for warm days and cooler evenings, plus a compact umbrella or rain jacket. See the full May packing list for Porto Alegre for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.