Ohio State fans wouldn't let freezing temps stop them from celebrating another national championship ... 'cause Buckeye Nation went absolutely bonkers in the streets of Columbus -- AND at the Horseshoe -- after their beloved team beat Notre Dame!!
The Buckeyes held off the Fighting Irish's late-game comeback to secure the 34-23 win and the College Football Playoff crown on Monday night ... and even though the game was in Atlanta, the fans back home didn't seem to mind.
Hundreds of supporters braved the cold and took their party public after the dub .