A new way to check the temperature

Keiko has figured out a good way to see how cold it is outside. We have one new window and one old one in our house. The old one is in the bathroom. It tends to freeze, including on the inside. on a day like today, in the 20's, we'll get maybe 1/2 inch or so on the perimeter. Last week we had some -20's weather. Then it comes close to freezing the whole window unless we have shower going for a while to thaw it out. Who needs the weather channel?