In one week of camping in up to 90 degree weather week before last the
highest my 'frig got was 51 degrees during the day, down to 31 degrees one
night. (I have a wireless temp sensor in the fridg that sends to info to an
external display)  I checked the high/low memory on the instrument after I
got home, 51 high, 31 low.  I was running on propane the whole time and had
the temperature control set to the middle of the range most of the time.
This is on the later model in a '90 Westy.  BTW, the damn fan ran almost
continually until the middle of the night.