I'm British for goodness sake, of course I can talk about the weather, a day absolutely NEVER goes by when I don't! As to whether it affects what projects I choose to knit is another question.
As I have spent most of the last 3 years since I returned to knitting, producing gifts for others, I could easily be knitting hats, scarves, mitts and blankets in the spring/summer ready to be gifted later in the year. However this year that is going to start to change. There are a few close family and friends that I love to knit for and will continue to do so, BUT I am going to knit for myself too. Consequently I will need to plan when I knit a project so I will actually be able to wear it when I'm done. In some ways its good that I'm one of those people who's always chilly, as a cardi is a permanent fixture in my life.
There was a period of about 2 weeks last summer when it was reaching the too hot for knitting point, you know, when your hands are getting sticky and it all starts getting a tad irritating. So in some ways I'm very lucky with our climate here as I can choose to knit what I wish, when I wish.
Wee hee, and I can assure you that is just what I do :)