Product review (2 stars): Attractive, nice display, but appears to have a bad temp sensor
My two AcuRite 00613A1 (one for my bedroom, one for the office) are great, especially for the price.  This unit has been disappointing.  Right out of the box, it seems to have a problem when temperatures get into the 80s.  The unit has never been directly exposed.  Originally, it was sitting upright on a wall mounted shelf under my porch awning; now it's hanging from a nail on my home's exterior wall, again, completely protected under an awning.

Perioidically, when temperatures get into the 80s, the display for the outside will read "158 F", which is the max temperature that the unit can record.  I tried resetting it, swapping batteries, and wiping the outdoor sensor off, but no matter what I do, the display "maxes out" periodically as it gets warmer.