The coldest I've ever felt since I lived in LA. It is now 8am, the sun is up and my backyard thermometer is showing the temperature outside only at 30°F. Imagine 32°F = 0°C. So it is really freezing cold. Luckily, my pool's water has not froze (as I seen out from my kitchen window) or else it may break the surrounding concrete, because as water freezes it expands. Also I don't see any frost on my neighbors' roof. This so cold ... sooooo cold!
We didn't have our central heater running over the night (but I think our gas water heater must have been running the whole night as it is located with its door facing the backyard and the door wasn't insulated) since the three of us were sharing the same queen size bed and queen size down comforter to keep us all warm. This is not a good weather for my baby to sleep by himself on his own crib because he is the type of baby who kicks off his own blankie and then sleeps on top of it.