The effect of cold is readily seen on men and women around here. As you go to more rural places, the women are in worse shape and generally aren't nice. Incidentally, it seems like the cold weather always spawns more fights at bars too so the disposition is seen in men albiet manifested differently. In general yes, it seems that being stuck inside effects a womens libido. Its very difficult to get dates with women from around here as some of them simply do not want to even venture outside. A physical degradation begets mental degradation and so on. Anyone who has ever been to Maine can see this very easily. The women there are in horrible shape and easily probably some of the ugliest I have ever seen in my entire life. Part of that is enabled by the fact that men are plentiful for these women, but part of it is also due to the cold weather.
When I dated a few girls from California, I tried asking why women were in such good shape and so nice. In short the reason for this type of attitude was that there are a LOT of beautiful women to compete with. Furthermore, when you are outside all days of the year, you are always showing yourself off. To use Maine as an example, you have a much longer winter season, much more lethargy, and virtually no competition since most women are hideous. In both instances, the surrounding lifestyles effect what women look like.