His late addition propelled the Tigers 10 spots in Scout.com's national recruiting rankings to No. 11.
His signing also gives Clemson what has to be considered its top recruiting class on the hardwood in at least the last 15 years, if not in the entire history of the school.
Three players signed with Clemson in the fall period, led by McDonald's All-American and five-star forward Milton Jennings. A 6-9 forward from Summerville, Jennings was ranked as the No. 23 player in the nation according to Scout.com.
Devin Booker, 6-8 forward from Whitmire, SC and brother of rising senior Trevor Booker, was ranked No. 65.
Donte Hill, a 6-5 guard from Virginia Beach, VA, is also considered a three-star prospect by Scout.com.
All four players are already on campus and enrolled in school for the second summer session.
Noel Johnson is the No. 13 shooting guard prospect in the nation according to Scout.com.
He chose Clemson over LSU and a host of other offers, including UNLV, Georgia Tech, Charlotte and others.
"We are pleased to be adding Noel to an outstanding recruiting class," head coach Oliver Purnell said in a statement last week. "With the loss of K.C. Rivers and Terrence Oglesby, he helps us fill a need at the wing position. He comes from an outstanding high school program and AAU program. I believe he has tremendous upside."
Johnson was first-team All-State as a senior after averaging 21 points, eight rebounds, and four assists per game.
His addition to the program continues a strong run by Purnell and his coaching staff over the last couple of years.
Not only has Purnell improved his regular season win total in each season as Clemson's head coach, but he's also led the Tigers to the NCAA Tournament in each the last two seasons.
The Tigers also reached the finals of the NIT three years ago after narrowly missing an bid to the NCAAs.