The highest day temperature in January 2026 was 102°F. The lowest night temperature was 61°F. The average values for day and night temperatures during January were 88.4°F и 71.5°F respectivly.

The average sea surface temperature in January 2026 for Porto Alegre was 83.6°F. The maximum and minimum values were 81.4°F and 86.4°F respectively.

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

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

The average wind speed in January is 7.2 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 January is 8.6 hours.