If I want to remove melasma with a procedure, is the timing important?

I'm getting little dark spots on my face...

I thought it would be much better to just go to the hospital and have it removed. It would be less stressful, too.

However, I have never had any procedures done on a face like this... (excluding eyebrows or hair removal)

Are there any guidelines like "avoid summer," or "sometimes it's good, sometimes it's bad"?

I also have a hunch that it might not be good when the weather is hot.

I'd appreciate your advice!