On the Met Office's Facebook page, https://www.facebook.com/metoffice,
there is a "weather-fact" which says -

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Fact #2 How cold does it need to be for snow to form?

The air temperature needs to be below 2C for snow to form.
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Not untrue, I suppose, in the same way that it's true to say that the
air temperature has to be below 25C for snow to form. What it fails to
say is how far below 2C it has to be for snow to form.

I must confess that I haven't the foggiest idea what they are babbling
on about. Did they intend to write "fall" instead of "form"? If not,
could someone there say how often snow forms when the temperature is
above 0C? [OK, I know there are different forms of ice that can exist
at temperatures well above that value but they wouldn't count as snow
so they can be ignored]

Even if the wording is incorrect and meant to refer to when snow falls,
it is still incorrect; snow can fall when the temperature is above 2C.

These so-called weather-facts could make interesting reading. I can
hardly wait for the rest of the dozen.


--
Graham P Davis, Bracknell, Berks. Mail: 'newsman' not 'newsboy'.
'Don't let old age put you off starting complicated jigsaws. If you
don't finish, it will give guests something fun to do at your funeral.'
- Bridget&Joan's Diary.