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I would like to know why it snows and what cause,s it to snow. How cold it has to be to snow?
The temperature in the Earth´s atmosphere has to be below zero, and humidity freezes in the Earth´s atmosphere and precipitates, I am not sure if this phrase is correct in any case it falls, I have not been to school
Check this website out.
http://en.wikipedia.org/wiki/Snow
Google.