December weather forecast in Porto Alegre

December in Porto Alegre is the windiest month of the year. In December, the weather in Porto Alegre is typically hot. Average daily high temperature in December is about 29 degrees above zero. On average, Porto Alegre has 12 rainy, 10 sunny, 6 partly cloudy, and 3 cloudy days in December. The rains are usually heavy. December as well as January, February, and March is considered the most uncomfortable time to visit Porto Alegre.