I can't speak for other states but the weather changes fast in Colorado, and most weather data sources are from weather stations that aren't exactly right next to you (nearby towns). You can't get an accurate forecast if there's no monitoring station in the area at all (wilderness area).
I have a couple of sources for data, including FM weather radio in my walkie talkie (which I only use while hiking with friends - I hunt alone), the weather service in my InReach Mini, and my cell phone (cell service is unreliable but not zero - it's common to pick up towers when you're up a hill somewhere). I haven't found any of them to be much value. It just changes too fast.
I basically bring what I need to survive anything. The only three decisions I really make these days are:
a) I touch base with my wife, if there was a forest fire or some other emergency nearby she'd let me know.
b) I check the forecast the day before I go for overnight lows. I can survive anything with what I bring, but if I know overnight lows will be below 15 or so I have a heavier sleeping bag I'll bring for comfort.
c) During certain months (October and beyond) I don't worry much about rain gear, just a super light disposable poncho for emergencies.