BTW, if you need to do a quick conversion of Celsius to Fahrenheit, my little trick is as follows:
Take the Celsius number (in this case, -25ºC)
Multiply that by 1.8 ... -25 x 1.8 = -45
Now add the number 32 ... -45 + 32 = -13
So, -25ºC = -13ºF ......Still cold, not matter how you slice it.