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> Fascinating messages, but where do you live, Mary-Anne, that you read
> the temps in C, and how does it translate into F???
There are 9 F degrees for each 5 C degrees.  0C is 32F, and 100C is 212F. 
So for each 10 C degrees, you have 18 F degrees:  so -10 C would be 32-18
F or 14F.  -20 C would be 14-18 F or -4F.  -30C would be -4-18F, or -22F. 
The two scales cross at -40;  -40F = -40C.

Or going the other way:  10C = 32F + 18, or 50F.  20C = 50F + 18, or 68F. 
30C = 68F + 18, or 86F.  40C = 86F + 18, or 104F.

(I have to do this all the time to communicate to hubby about
temperature--as a Dane, he grew up with C and still can't quite
"visualize" F temperatures without a conversion...)

Heidi



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