puerto rico: Which is populated. Even if none are "cold" which is the least hot populated city area? Cayey? On average, which is a hotter country Australia or Puerto Rico? Would it be unusual to find someone wearing jeans a jumper in Puerto Rico? Just some curious questions please answer and no offence intended.|||The coldest, populated, part of Puerto Rico is the mountain town of Aibonito. It holds the record low of 32.. Up there even in the summer temperatures rarely go higher than the low 80's and in the winter it's gone down into the mid 40's. Adjuntas is also another town that gets lower temps. Australia has much higher temps than PR ever sees. And it's not unusual at all to see people in jackets and hats in the cooler mountain towns in the winter, in fact many homes in the higher regions have fire places!|||The mountaintops are coldest but they're not populated. I guess the coolest populated area would be far away from San Juan as you can get. It's not strange to see people at night wearing jeans or a jumper. I believe Puerto Rico would be hotter than Australia w/ the exception of maybe the desert in Aussie. I hope that helps you.|||Mountain towns as Aibonito, Cayey, Orocovis, Barranquitas, Coamo, Las Marias, Arroyo and Jayuya. Temperatures may reach 30's degrees, which is pretty cold, but not that bad. Mostly of the time this happens in the "winter" time which is from November to February.|||its the highest point in PR Cerro de Punta 1,338 m and its located in Jayuya|||It's not really "cold' but he coolest part of the island is up in the mountains at the highest elevation you can get too.