Heat rises. There are other variables in a car such as whether or not sunlight can get at various places and other heat sources such as engine, exhaust, so forth. So the best is going to be under the drivers seat in most cars.the glove box may be influenced by engine heat and or the heater core and or direct sunlight. So the center console is probably the second best choice. Edit I try not to park where the sun will be coming in the windshield if I can help it in the summer. In the winter it’s just the opposite.
Center console is my bet. Would liked to have seen a control reading based on cabin air temperature. But still good data.
My guess:
Blue: Below Driver's Seat
Yellow: Center Console
Red: Glove Box
I also think, from coolest to hottest:
- Under the driver’s seat
- Center console
- Glovebox
Center console Blue
under driver seat red
glovebox yellow
Center console Blue
Under driver seat yellow
Glovebox red
I will go with Calvin on this one.
Under seat coolest, glove box 2nd coolest, middle console worst.
I second that one. The hottest items are exposed to the sun.
This is my guess too. Speculating that the closed compartments benefit from not being directly exposed to the hot cabin air, while under the seat would be.
Let me go all wrong here 
Blue=Glove Box
Red=Seat
Yellow=Console
or
like @4492011 said
Blue=Console
Red=Seat
Yellow=Glove Box
does it matter?
they are all too hot to charge the battery (all are over 113F), so dont leave a liIon on charge in the vehicle, on a hot day
the hottest spot is also above the max operating temp for a LiIon (140F), so dont try to use that light until it cools doewn, or it may have “venting with fire”
otoh, if you neither charge, nor use the lights, at the temperatures stored in a car
then
it makes no difference where in the car the light is…
I hate guessing, so, when youre ready, just tell me Im right… cause I already know where the hottest spot is, and I aint tellin… lol
I’m going to say under the seat is the hottest due to the heat coming off the asphalt. My initial thought was that the glovebox would be the hottest place since the sun would be beating down on the dash but I’ve never noticed my glovebox being hot when I reach in it.
1. Glove box the coolest
2. Under the seat
3. Center console the hottest
Of course the coolest spot in my Blazer is in the rear in the ice chest. Also another major variable is if your windows are tinted and how dark they are. Even with my fishbowl the rear being tinted 20% you can tell it’s cooler than the front seats with 35% on the doors. I use a windshield shade if I have to park long term in the sun. My interior is saddle (tan) so it will be cooler than a grey or black most modern cars come with.
Anybody who’s ever worked on a sunroof is familiar with how hot the roof of a vehicle can get. A few square feet of sheet metal acts as a nice collector and heat sink in direct sunlight.
It’s tough on thin layer of foam between the headliner fabric and the backing board, and the adhesives that hold the sandwich together. Drooping headliners are not uncommon, even though they’re serve no duty other than as decoration, and receive no direct contact or wear. Refinishing them requires an adhesive that is both strong and heat resistant.
Modern vehicle designs with steeply raked windshields result in more dashboard surface area, and more exposure to sunlight, and a dark-colored dash, as they often are, adds to that. So the glovebox, sitting below that nice heat collector, is my guess as the hottest of the candidates.
Between the center console, and under the driver’s seat, the latter sees the least exposure, and is unenclosed, so it will be the cooler of the two. The floor contains most of the sound insulation material in a car, and between it and the carpeting, is well insulated from ground heat, as well as that generated by components like the catalytic converter and the exhaust system.
under driver seat is the coolest.
You and me got this!
^ this
I’m going to go the opposite of the majority and say that:
Column E = Glove Box
Column D = Under the driver seat
Column C = Center console
I’m going to guess the Glovebox is Column C the coolest… because that’s where I store mine
The console is exposed and higher up, so that would be hottest.