LCD does freeze up in cold temperatures ("cold" here being well below 0C) , but that should just make changes on the display sluggish, not entirely fixed. I've never had a computer totally freeze due to cold weather, and I've used several brands in -15 to -20C. As someone mentioned earlier, they still log all the information, even though the display is way behind of what's happening.

If you have a wireless setup, you might want to replace all the batteries, not just the one in the computer. It's still a cheap test. And keeping your computer in the fridge is not a good idea, IMHO.

--J