I don't think it's about "advisability" per se, but desirability. I probably shouldn't have used the word "possible". I guess possible relative to my ability to deal with it.
Sure, you can walk in a snowstorm, when it's -15F, when it's downpouring, when it's 100F, but these are hardly a refuge from the inside environment in many cases.
Don't get me wrong. I've spent plenty of time doing exactly this, but my underlying point is that it's not a consistent or low friction option.
Kind of curious what season it’s impossible to walk in, and how it’s related to 4 seasons?
I’ve lived in 4 season climates my whole live, and the only time I can think of it would be inadvisable to take a walk (though not impossible) is in the middle of a thunderstorm/typhoon.