The temp consideration certainly makes sense, thanks! Flying the approach regularly I concur you don't want to be too low, it takes you pretty close to hills just left of the final.
Another interesting point for KCRQ, the straight-in LLZ MDA is 1000 ft. For several weeks there was an FDC NOTAM out
lowering the circling MDA to 940 ft. Unfortunately the NOTAM is no longer around to prove my point, probably since they just updated the approach to include a DME. Is that something that could theoretically occur or was it a mis-print?
KCRQ ILS/DME:
http://204.108.4.16/d-tpp/1109/05310ILD24.PDF