Growing up in Norway, kids spend A LOT of time outside. Before I came to the US I thought everybody had their babies nap outside, or that daycare meant spending at least half the day outside. When my friends acted shocked, I realized this was not the case!
Yes, Norwegians put their babies outside to sleep during the day. In all kinds of weather. The idea is that the fresh air is good for the child. So you put the baby in a pram, with some light wool clothes and a hat, and tuck him or her into a warm sheepskin or down sleeping bag. ALL YEAR ROUND. My sister and I have both worked at daycares and it is kind of funny that naptime means putting all the little ones outside!
In Norway we have a saying that goes "There is no such thing as bad weather, only bad clothes," meaning that we should never worry about the weather, just make sure we are prepared for it...
Oh, and this reminds me of the Danish lady who was charged with child neclect in New York City for leaving her child in a baby pram outside a restaurant. We find that totally normal!