When it rains or snows, do you describe the weather as being "bad"?
I'd have to say that a majority of people I encounter (i.e. coworkers) consider precipitation to be a "bad day". They often use adjectives such as "terrible" and "gloomy"...perhaps they're just pessimists...?
If it's bad enough to stay off the road I'd say bad for driving but not overall.
No. That's not bad enough to be called "bad," & to some degree it's very pleasant. "Bad" is ice storms, icy roads in general, or thunderstorms if I need to be walking somewhere.
No, I love the rain
I find thunderstorms to be soothing...
It is what it is. Better if we know if it in advance, but not detrimental if we don't.