Weather in Porto Alegre in March 2025
Average weather
Average temperature in Porto Alegre in March
Going from a maximum of +34°C during the day to a minimum of +17°C during the night, the temperature in March averages around +30°C.
The average maximum temperature goes down 6% by the end of the month, compared with the beginning of the month, from +32°C to +31°C.
Is Porto Alegre warm or cold in March?
Porto Alegre is typically warm in March.
Maximum temperatures go down compared to the previous month from +29°C to +28°C. The minimum temperature also goes down from +21°C to +20°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
Take a look at how March is compared to other months in Porto Alegre:
Climate in Porto Alegre in March
| February | March | April | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +29°C | +28°C | +25°C | ||||
| Min. temperature | ||||||
| +12°C | +10°C | +6°C | ||||
| Max. temperature | ||||||
| +40°C | +38°C | +35°C | ||||
| Rainfall | ||||||
| 120 mm | 106 mm | 108 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 2 m/s | ||||
| Humidity | ||||||
| 78% | 79% | 81% | ||||
| Air pressure | ||||||
| 1011 HPa | 1012 HPa | 1014 HPa | ||||
| Sunny days | ||||||
| 5 | 7 | 8 | ||||
| Cloudy days | ||||||
| 4 | 6 | 8 | ||||
| Rainy days | ||||||
| 17 | 16 | 13 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
March weather is still as ok as in February. It’s getting colder in March. From +29°C in the day, the average maximum temperature lowers to +28°C. As March arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 120 mm to 106 mm. Humidity rises from 78% to 79%. The average wind speed doesn’t change much during March, staying around 2 m/s. The good news is there are likely to be more sunny days in March, from 5 to 7.
But maybe it is worth considering traveling in April as the weather gets better.
Wind
The average wind speed is 3 m/s getting up to 5 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Porto Alegre is gradually increasing during March, going from 3 m/s to 3 m/s over the course of the month.
Rain
How was the weather last March in Porto Alegre?
Climate Change over Years
The climate in Porto Alegre in March has not changed much over the last 43 years.
The average temperature was the lowest in 1983 (+23°C) and the highest in 2012 (+26°C). The driest year was 2004 with only 1129 mm of rainfall, and the wettest year was 1998 with 2041 mm.
FAQ
Is March a good time to visit Porto Alegre?
Can you sunbathe in Porto Alegre in March?
Is Porto Alegre rainy in March?
Is it sunny in Porto Alegre in March?
Other cities in Brazil
Monthly weather in Porto Alegre
Source of the data
For this page, we’ve looked at the typical weather in Porto Alegre, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.