Forgive me if I'm not aware that this feature exists.
I'd LOVE for there to be an on-board digital thermometer. Getting the weather from a station miles and miles away, and even through altitude differences, is not very accurate. For example, when I go hiking, I'll bust out my TriCorder App for altitude & compass features. I often would like to know the actual temperature right then and there. I know I can get a cheap thermometer as a stand alone item, but if this was built-in to the device it would be AMAZING!