wrote:
ASOS, AWOS, or a qualified weather observer, if I'm not mistaken.

I guess the next question is, "reported to whom?".

Let's say for example my FBO has a certified weather observer on staff. I
call up on unicom, ask for the weather, and am told it's 5000 broken and 2
miles. Does that count as "reported"? When I ask ATC for a contact
approach, they won't have that observation. Do I just tell the controller
that I've got a report from the FBO?