I have tried to compare the operation temperature on Dash camera from the manufacturer homepage, to see how well the manufactory have design the camera to withstand the temperature in a car.
The reason for that, was I measure my dashboard a warm summer day in Virginia, USA. I'm sure you easily will find a temperature much hotter in USA, EU, Asian and Australia.
That day I measured the temperature it was 35C/95F in the shade and after a half hour drive in the sun, with A/C on max cooling the dashboard temperature was 65C/149F. After 15 minute without the A/C on the temperature was 80C/176.
The most camera is design to be mounted on the windscreen. Some car has toned part of the windscreen to shade other don't. So the camera will more or less be exposed to suns ray and will probably get close to these temperature, before the dash camera had be turned on. I don't know how much heat a dash cam produce, but I would like to see the manufacturer in general, design a camera with a wider temperature range.