I'm going to assume that you are talking about the 1952 movie, and not the 2000 made for TV movie. The director was Fred Zinnemann. The writer of the screenplay was Carl Foreman.
The film was produced by Stanley Kramer and was loosely based on the story "The Tin Star" by John W Cunningham.
High Noon won the Oscar for Film Editing in 1952.
High Noon at Mercey - 2001 was released on: USA: 2001 (Mercey Hot Springs Film Fest)
-It's a Wonderful Life -High Noon
The High Noon Moon - 2010 was released on: USA: 23 January 2010 (Winter Shorts Film Festival)
There's no listing of Tex Ritter in the cast for "High Noon" . He did sing "High Noon (Do Not Forsake Me Oh My Darlin')" for the film which went on to win an Oscar for Best Song in 1952 .
The movie High Noon was released in 1952 and was directed by Fred Zinnemann. The movie starred Gary Cooper and Grace Kelly and was the recipient of four Oscars.
Darkness at High Noon The Carl Foreman Documents - 2002 was released on: USA: 26 January 2002 (Miami Film Festival)
Well, you're looking at it backwards. The concept of "noon" is man-made. Noon describes that point during the day when the sun is directly (or nearly) overhead. So, to answer your question, the sun is high in the sky at noon because we define "noon" as that time during the day when the sun is high in the sky.
The Production Budget for High Noon was $730,000.
High Noon was released on 01/01/1952.
The legendary actor .Gary Cooper
The Ballad of High Noon was created in 1952.