....Even a few miles walking in the rain makes me feel good.
Same for me, to a point. I'd go out in light rain/drizzle and reasonably enjoy it....but heavy rain, especially if accompanied by strong winds, is a definite no! There is no joy at all in walking in those conditions.
If I'm on a group walk and the weather turns really bad, then all I can do is tolerate it until it's over!
Generally though, it isn't weather that stops me from walking. It's other stuff. I'm lucky that I can walk any day of the week though, so nothing stops me for long