If you're looking for summer vibes, the best time to travel to Viedma is in January, February and December, when the average temperature reaches 28.08 °C, while January, December and November are the 3 sunniest months of the year, with an average of 195.98 hours.
However, if you prefer colder temperatures, make sure you visit Viedma during June, July or August to experience an average of 2.98 °C.
For those who don't care too much about temperatures, but want to avoid getting wet in the rain, it's important to avoid travelling during March, July and January, when the average precipitation in Viedma is 2.65 mm, while the months of January, February and March are drier, with an average of 0 mm.