The highest day temperature in March 2026 was 99°F. The lowest night temperature was 67°F. The average values for day and night temperatures during March were 87.9°F и 72.3°F respectivly.

The average sea surface temperature in March 2026 for Porto Alegre was 82.3°F. The maximum and minimum values were 80.8°F and 85.2°F respectively.

Most of the days in March are sunny but you can also expect cloudy and gloomy days.

Precipitation total in March for Porto Alegre is 1.2 in. It makes march one of the least rainy months of the year.

The average wind speed in March is 5.9 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Porto Alegre in March is 7.6 hours.