The 2000 Iron Bowl was cold and wet but I remember an Iron Bowl in the late 70's that was 28 degrees in the afternoon. It felt much colder. The wind was whipping under the open end of the south end zone. By the time the game ended I couldn't feel my hands or the lower half of my legs.
I think it was 1977 or 1978. Only time I remember the ice in my Coke getting larger instead of smaller.