How cold is it outside? What time is it?

I often look at the Yahoo weather app in the morning.  I have three other indicators of the temperature outside.  It was about 37°.  But other apps often give different readings.  We have two thermometers outside and they never agree exactly.  We attribute the difference to the difference in the ages of the two.  Sometimes, the best thing to do is to go outside and sample the weather physically.

I often look at time.gov if I am hankering for exactish time.  The web page even gives a correction for the transmission of the time reading across the wires of the internet.  In a way that seems related to trying my own reaction to the outside temperature, I sometimes ask how others I am dealing with seem likely to read the time - phone?  Computer?  Watch?  House clock?  In the end, everything seems to be an approximation.