Weather in Bariloche can be a bit unpredictable with temperature drops and sudden snow. The higher up you travel into the mountains, the more likely you are to run into sudden weather changes.
During the summer you’ll find it short and dry with January and February holding the titles of the warmest months of the year. Daily temperatures tend to average in the 70s with lows that sometimes drop into the 40s at night. One thing that is important to note is that even though it is summer, snow still finds its way on the top of the mountain peaks.
Winters are known for being long and cold with temperatures hovering between the 40s and 20s. The coldest months of winter include June, July and August. Because of this, it’s best to plan for constant low temperatures and pack warm clothing year round.