Cheap Oregon Scientific BAR386A-BK Wireless Weather Forecaster with Temperature Display and Self-Setting Atomic Clock, Black Review
This was easy to set-up. I placed it next to two other inside thermometers, and the Oregon Scientific reads within .4 degrees of the two others. I placed the outdoor sensor under the northeastern eave and, at near-freezing, it reads 1.4 degrees warmer than the nearby Weather Underground sensor (wunderground.com). My only complaint is that there is no backlight feature -- but that would probably drain batteries too quickly.
