Used when someone's actions directly cause an unfortunate result, emphasizing self-responsibility. By ignoring the weather forecast and not bringing an umbrella, you only have yourself to blame for getting wet.
Pro Tip 2/3
No External Blame
Highlights that no one else is at fault; specifically rejects the idea of blaming others. You only have yourself to blame for overspending when you were warned about your budget.
Pro Tip 3/3
Not for Accidents
Typically not used for situations that are genuinely accidental or out of one's control. He couldn't blame the snow for the car accident; he only had himself to blame for speeding.