I keep my Oakley's cased and in the center console. I haven't had any problem with them getting too hot there. I'll bet it does get pretty warm in the overhead console with the sun beating down on the roof.
Current- 2016 Race Red Focus ST1
Traded In - Sedan Revolution #249 - 2012 SE Sport - ╠╬╝ - Ingot Silver - 201A - K&N w/ snorkel delete - Blox Type R Knob