No. Age is just a number.  What does make you mature though, is the things you have been through in life. How you dealth with the hard times and what you learned from them. How many mistakes you made, that shaped the person you are now.  Times that you fell on the ground, but stood up.  . Did you crumble under the pressure of life, or did  you come out as a hero? 

Those are the kind of things that make one more mature. Life experiences. Lessons learned.  

That said, I've met people throughout my life that were much more mature than their age would suggest and in my experience they were one of the most valuable people that came into my life. Most of them have been through some really hard times but they came out as heroes. Much better people than they would have ever became if it wasn't for what they had to go through.