Its cold in Texas today, 11 degrees when I left the house at 5:50am this morning, here are some sayings we use in Texas:

Cold
This is hog killing weather.
There's only a strand of barbed wire between here and there and its down (after a blizzard).
Cold as a frosted frog.
Cold as an ex-wife's heart.
Cold as a cast iron commode.
Cold as a banker's heart.