UV Index
UV Index
Today's UV index in Porto Alegre, Brazil 
will be up to 4.7, indicating a moderate level of sun exposure for the average person. Check our tips for today to make sure you're safe in the sun.
Last checked: 2025-05-10
With a UV index reaching up to 4.7 in Porto Alegre, stay shaded during midday when the sun is strongest; wear protective clothing, a wide-brimmed hat, UV-blocking sunglasses; apply SPF 30+ sunscreen every 2 hours, even on cloudy days; and be cautious of heightened UV on bright surfaces.
The UV index in Porto Alegre varies throughout the year, with higher values typically seen during the summer months, reaching levels around 10 or 11, indicating very strong sun exposure. During winter, the UV index usually drops to moderate levels between 3 and 5.
Porto Alegre experiences warm summers with temperatures often above 30°C and mild winters with temperatures ranging from 10°C to 20°C. Rain is fairly evenly spread, but autumn and spring see more frequent showers, while winters are generally drier.
Compared to other Brazilian cities, Porto Alegre is cooler due to its southern location. It is less humid than northern cities like Manaus. Neighboring Uruguay and Argentina have similar weather patterns, but Porto Alegre tends to be warmer in winter than cities further south.
See the UV index hour by hour for Porto Alegre, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.