Porto Alegre Weather in March
During March, Porto Alegre experiences high daytime temperatures of 30°C (86°F) and cooler nights around 19°C (66°F). Expect quite a bit of rainfall. Around 117 mm (4.6 in) is typical.
Rainfall in Porto Alegre in March
Historically, March sees about 18 days of rain, with a monthly average of 117 mm (4.6 in). Expect frequent rainfall this month, and not just light drizzle. When it rains, it tends to come down hard.
Temperature in Porto Alegre in March
Expect highs of 30°C (86°F) in Porto Alegre in March, with nights dropping to around 19°C (66°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. With lows of 19°C (66°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.
Sunshine in Porto Alegre in March
The month enjoys around 201 hours of sunshine, creating mostly sunny days with good weather conditions.
Wind Speed in Porto Alegre in March
Wind speeds average 1 m/s (2 knots) during March. At this speed, you'll experience mostly light air movement that's just barely noticeable. As an average, some days will be completely calm while others have gentle breezes you can feel on your skin.March in Porto Alegre can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.
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 March
Min Temperature
19°C (66°F)
Max Temperature
30°C (86°F)
Chance of Rain
59%
Precipitation
117 mm (4.6 in)
Rainy days
18 days
Humidity
75%
Windspeed
1 m/s (2 knots)
Sunshine
201 hours
Percentage Sunshine
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Porto Alegre typically stay consistent throughout March, with daily highs averaging around 30°C (86°F). Nights are pleasant, with lows typically ranging from 18°C (64°F) to 21°C (70°F).
Average temperatures in March
Daily Historical Precipitation
49-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in March
Historical weather for Porto Alegre in March
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 March
Based on weather observations in Porto Alegre between 2003 and 2026, these are the recorded extremes during March.
- On March 14, 2020, temperatures climbed to 38°C (100°F), marking the warmest March day on record.
- The coldest March day was on March 31, 2022, with a maximum of 20°C (68°F).
- Nighttime temperatures dropped to 10°C (50°F) on March 29, 2012, marking the coldest March night on record.
- The wettest day in March Porto Alegre was on March 12, 2017 with 53 mm (2.1 in) of precipitation.
Best Places in Brazil in March
Find out more about the weather in Brazil and which places have the best travel conditions in this month. See all of Brazil in March →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Porto Alegre in March
Warm weather calls for comfortable, breathable clothing in March. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). High rain levels are expected, so pack waterproof gear and an umbrella or poncho. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Porto Alegre in March
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.
