-40 degrees Celsius is equal to -40 degrees Fahrenheit.
96
Moist air holds heat better than dry air.
114
Dirty snow melts faster than clean.
350
The winter of 1932 in the US was so cold that Niagara falls froze completely solid!
442
The winter of 1912 was so cold that Niagara Falls froze over.
35
Temperatures have been cooling since 2002, even as carbon dioxide has continued to rise.
106
Circumhorizontal arcs (loosely known as fire rainbows) are the rarest of all naturally occurring atmospheric phenomena.
21
Oak trees are struck by lightning more than any other tree.
266