Maybe it is as cold as a frosted frog.
Cold as a banker's heart or as cold as a well digger's tail.
Cold as a cast iron commode....now that IS cold.
Cold as an ex-wife's heart.
We are expecting cold temperatures here all week. The temps are dipping into the teens during the night and we are expecting single digit temps later in the week.....along with some snow.
Personally, I would prefer it to be hotter than Satan's house cat right about now.