Can I wear jeans in Patagonia?

Absolutely not. They take days to dry and will be heavy and uncomfortable if you encounter the frequent Patagonian rain or snow.

Do I really need a puffy jacket in summer?

Yes. Even in the peak of summer (January), temperatures at high passes can drop near freezing, especially when combined with the constant wind chill.

How to pack clothing for Patagonia hiking

Pack according to the 'three-layer' system: a moisture-wicking base, an insulating mid-layer, and a high-quality hardshell jacket. Patagonia weather changes within minutes, so you must be able to add or remove layers quickly without stopping your hike for long.

Select your base layer. Bring two sets of merino wool or synthetic long-sleeve base layers. Avoid cotton at all costs; it holds moisture, stays cold when wet, and is the primary cause of hypothermia in high winds.
Choose your mid-layers. Pack one lightweight fleece for movement and one down or synthetic 'puffy' jacket for stationary warmth. The puffy jacket should be compressible enough to fit into your backpack during active hiking hours.
Prioritize a windproof hardshell. Wind is your biggest enemy in Patagonia, often gusting over 60 mph. Invest in a high-quality Gore-Tex (or equivalent) jacket that is fully windproof and waterproof. A simple rain poncho will fail in these conditions.
Bottoms and extremities. Pack two pairs of quick-dry hiking pants and one pair of waterproof overtrousers. Bring two pairs of thick wool hiking socks per day you are on the trail and a wool beanie that covers your ears.

Can I wear jeans in Patagonia?: Absolutely not. They take days to dry and will be heavy and uncomfortable if you encounter the frequent Patagonian rain or snow.
Do I really need a puffy jacket in summer?: Yes. Even in the peak of summer (January), temperatures at high passes can drop near freezing, especially when combined with the constant wind chill.