Wilt wrote in post #12478506
Nothing wrong with spotmetering the sky! If I were metering background, I would want to use a selective metering mode (Spot, Partial) and not Centerweighted and absolutely not Evaluative (since you have no idea how Evaluative is weighting any particular zone)
However, in the OP's background, there are the sky and also other people (i.e., not the subject(s)), trees and buildings. If the sky is properly underexposed, the other people, trees and buildings may be seriously underexposed.
Now I guess this is a question only the OP can answer. Maybe he would like it that way. Then it's fine. But if he would like the other parts of the background to be more visible, then he might have to make the sky less underexposed or even overexposed. That's what originally made me think that spot metering may not be very helpful.