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To be honest Ray, sensor temp is nice to know, but if you stick to the calibration formula and religiously take darks and flats immediately after or during imaging (bias if your software needs them), you shouldn't have a problem. Your image will be easier to analize for problems after proper calibration.
Temperature differences are inevitable with uncooled DSLRs. What matters is that you are taking calibration frames around the same ambient air temperature. If you take enough, the average is better and accounts for fluctuations in sensor temperature.
If you take your darks in an identical sequence to your lights the frames should be more consistent. It's all about consistency when working with temperature. That's why regulated cooling is an advantage.
Dithering, and I don't mean by a half or 3 pixels, but aggressively, for uncooled DSLRs, (12 - 15 pixels) will take care of a host of noise problems as well as inevitable calibration artifacts, due to slight temperature mismatches 5C or so.
An uncooled DSLR sensor is not at all like a cooled CCD.
Rant over...
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