Roger Coppock wrote:
While I was examining another question, I happened to notice a
large difference between the variances of the daily high and
daily low series. The day to day variance of the daily high
series is much greater than the day to day variance of the
daily low series.

Why are daily lows steadier that daily highs? I am sure
someone has seen this before, it is way too obvious to overlook.
Does anyone have any references?



1. In cloudy conditions, the temperature does not change much anyway.
2. In clear conditions, the overnight low temperature is governed (to
some extent) by the moisture in the air, and the moisture is also slow
to change. Overnight lows in clear conditions tend to fall to somewhere
near the dewpoint.

--
God grant me the serenity to accept the things I cannot change, the
courage to change the things I can, and the wisdom to know the difference.
--- Serenity Prayer