I've found that temsensor not work properly when it is below zero degrees Celsius. But the GPS displays the correct temperature.The Virb displays about 650°C.
You and me both--Yes, it is a camera, but the reason I selected this camera was to get sensor data into the video--as their own advertising says--bragging rights. Of course, in addition to the temp data actually working below 0c, we still need an overlay to get it on the video.