It only goes down to -5 in the worst cases here, and that very rarely, its usually the wind chill.

Can lower the action dramatically on the guitar, I recall a Yamaha FG300 where the strings were flush with the fretboard. Had to send for my other guitar.


Certainly brings the colour to your cheeks.

Correct insulation essential.

It helped me to develope my fretboard hand ,block and barre chords are out, as its important to keep the fingers moving, or else they may freeze and drop off.
Strumming is no good either.