You can address a weakness from your personal life as long as it remains appropriate in a professional setting. In other words, try to avoid events that are too personal or heavy. Use your best judgment here. You can also cite a personal example and demonstrate how your trackable progress can transfer to a professional setting.
A good personal anecdote might be how you improved your critical thinking skills when you ran into a plumbing issue while renovating your bathroom. Or perhaps how you performed poorly in your competitive doubles tennis match due to poor communication, and subsequently prioritized teamwork drills and better verbal communication to go on and win your next doubles tennis match.