The temperature on my cars display at 1pm was 32degC - it sits in full sunlight.
After driving for 10 mins with the windows open, it only dropped to 24degC.
It's a lovely warm day out there!
Annoyingly the walls of my ancient house are 18-24" of stone, so inside is still pretty cool (heating on low, warm jumper - even today) and it takes a few weeks for the inside ambient temperature to warm up.