Just something I found. APT tends to overshoot subs by "1" second thus auto matching darks can be a little difficult. Indeed what are the "darks temperature", apart from reading the EXIF.
I found a piece of software,
"Dark Library" written by Steve on CN.
With this you can auto match and insert darks & lights into DSS or search for darks allowing for difference in exposure range time and temp range.
Obviously it's reading Exif temp and this in itself may not be the sensor temp but it's probably as close as one can get and the ability to user select a range of dark temps really helps.
Well worth a look at for DSLR'ers and maybe deserves a thread on it's own.
As you can see from the screen grab I had subs I thought to be 10 degrees C (measured by digital thermometer air temp) but this is showing they actually vary from 15 to 17 degrees C!