Even though I'm an Americano here on an Everton forum, I live in Paraguay. So your winter/our summer. And we're flying for most of it, aside busing around the lake for El Calafate/El Cheltan/Punto Natales.
It's about six weeks until the far south end of the trip - El Calafate/Ushuaia and still hovering around single digit temps (C) down there. At least we're escaping the brutal summer here. Around 40c/100F with humidity north of 50%... just miserable walking anywhere. And I say this having lived most my life in Arizona, where we have 100 days of (DRY) 40c/100F a year.
Ah I see now.....I suppose the title under your name does give it away.
As I mentioned earlier I went to all 13 countries last year and Paraguay was the hottest by far, it wasn't even summer and it was up to 51c......It was 36c while having a beer at 3 in the morning for christs sake!