I as well as many of you are witnessing the polar plunge this week. When I wake up the house is at 55F. I am retired and i don't turn up the heat until my DW comes home from work. What I have noticed is my mahogany, koa, and macadamia 'ukes need retuning during the transition but my '50s Maccaferri is ready to play whatever the temperature. Styron