by Kip Hansen, October 2, 2018 in WUWT

In the comment section of my most recent essay concerning GAST (Global Average Surface Temperature) anomalies (and why it is a method  for Climate Science to trick itself) — it was brought up [again] that what Climate Science uses for the Daily Average temperature from any weather station is not, as we would have thought, the average of the temperatures recorded for the day (all recorded temperatures added to one another divided by the number of measurements) but are, instead, the Daily Maximum Temperature (Tmax) plus the Daily Low Temperature (Tmin) added and divided by two.  It can be written out as (Tmax + Tmin)/2.

Anyone versed in the various forms of averages will recognize the latter is actually the median of  Tmax and Tmin — the midpoint between the two …