-30.....?!?!? how do you live with that?? I have +2c and almost die... The minimum temperature i saw was -5c at 3000 meters in switzerland, and i was afraid that my ears would fall to the ground. -5c was the limit for me. Everyone around was fine, but could barely breath... the air in my lungs was to cold for what my body is used to.
I cannot even imagine what is -30....
but in the other point of the scale, i know what is >40șc... in some areas in Portugal, 3 years ago, i got +46șc .... thats hot !