What do/did you do about a sleepsack or PJs when the weather gets warmer?

It's getting warmer here (for now-- back to the 50s again this week ) We usually put C, 9.5 months, to sleep in footed PJs and a sleepsack, either light A&A one or a warm fleece one, depending on the temp. It's been so warm the last couple of days we put her in a short sleeve onesie and the A&A sleepsack, which seems to work OK. We do have A/C but try to only use it when we really need it.

So, wondering if we need to buy another lightweight sleep sack, or if we should plan to transition away from it anyway? When did you stop using it?

FWIW she scoots around the crib a lot, but hasn't tried standing up in it yet.