what is the ideal temperature and humidity to keep in your room for electric/acoustic guitars, along with violins?

40-50% is happy medium as you want some but not to much
Ibanez AEL10E BLK- W/ Graph Tech Nut, Saddle and Pins
Duncan Woody XL Pickup w/ stock fishman EQ

Schecter C1+ Darksunburst w/ SH-4 (N) & SH-6 (B) 24.75"
Gain boost Switch
11-14-21w-38w-49w-60w D'Addario strings
ENGL Fireball+Savage+Vader Cab
And keep it away from any sort of extreme temperatures (furnace, freezer, etc.)

If you travel with it in the cold allow it to warm up in it's case for up to an hour before you pull it out.