Leaving alone for a second the fact that we often went to school in weather exactly like this as kids, most area schools are closed Monday due to below-zero temperatures and harsh wind-chill.
The most conclusive list of closings, which includes Madison, Middleton and Sun Prairie public schools, can be found at WISC's school closings database.
Meanwhile, the Forons are revelling in the cold, sharing experiments one can only attempt when it's this bone-chilling cold.