The weather in Patagonia can change drastically very quickly. For that reason, all trekkers should carry a daypack with a waterproof/windproof layer or shell; a light fleece or sweater; and hat. Also, be sure to layer adequately so you can pare down your layers when necessary.
The weather in Tierra del Fuego is similarly unstable at any season of the year. Still, the weather is not as severe as people think, since mountains and the sea temper the winds and the temperature. In summer, the average daytime temperature is is 64°F and 50°F at night. The average winter temperature (July/August) is 34°F.




