I consider the sort of information you’re talking about to be part of describing the environment. What the weather’s like is obviously so. I, as DM, will generally describe the general environment of the campaign milieux at the beginning of the campaign, which would include things like the mayor’s name or whether it’s known that there are bullettes nearby. This information is known generally by the inhabitants of the area because they are present in that environment and is very different from information a player might seek to ask me for based on their character’s unique backstory. I realize that some DMs feel that it’s important to control character backstory to one extent or another, but I’m very hands off in that regard, so I will usually respond to such inquiries by asking the player to divulge details about their character’s backstory that would give them access to such information, which they are free to invent. So there’s definitely information available to all the players, but they don’t have to ask me for that (unless I’ve forgotten something) because I’ve already told it to them. This is why that type of question can be annoying, because it implies that I haven’t done a good enough job of describing the environment when in actuality it represents an effort by the player to gain information that’s not present in the environment without risking their character in any way.