While the weather in El Chaltén can be unpredictable, it is a semi-arid environment with light precipitation common. It is essential to be prepared because the weather can change instantly from sunny to stormy.
The warmer temperatures are recorded in the summer from November to March. Highs are typically in the 60s during the day and 40s at night. It is not uncommon to experience frost in the summer so always bring warm layers! In the winter, temperatures stay in the 40s during the day and drop to below freezing at night.