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If you generally travel in the traditional summer months of June through August, you might be interested to know that in Ushuaia, contrary to most vacation destinations, the summertime is actually wintertime and it’s very cold here during those traditional travel months of June, July and August.
However, if you do plan to visit during this time, be aware that rates are lower, crowds less of a problem and various destinations less booked. High temperatures average in the low 40s June through August, while the nights get even chillier, with average lows in the upper 20s and low 30s.
No matter how cold it is in Ushuaia, however, the indoors are always well heated. If you plan to be inside most of the day, you will want to dress in layers so you don’t overheat in the stores, museums and other sites. You won’t be cold once inside during the winter.
The high season in Ushuaia is October to March, and that’s when the rains come. Most of these months average around 10 inches of rain each, however temperatures are manageable, with highs in the high 40s to high 50s and nighttime lows in the upper 30s and low 40s.