Extract brewing here:
After the boil, I put my pot into an ice bath to cool the wort before topping off. Generally I cool the wort to 100°F (37°C) before transferring to the fermenter. Today I cooled to that temperature as usual, then topped off, but found that the temperature read a few degrees higher than expected (76°F vs. 70°F).
Rewinding for a moment, I noticed that temperature readings near the outside of the pot tended to be warmer than those I took from the center -- usually by at least +10°F. So that being said...
Where is the "correct" place in the pot to take the temperature while cooling the wort?