Thursday, July 25, 2013

Where do the "normals" come from?

At CBS4, we show you the daily "Almanac" that shows the temperatures observed, the normal temperatures, and the record temperatures.


Many people may wonder how the "Normal" temperature is calculated.  It's actually rather simple.  Take today (July 25th) for example.  Our normal high temperature is 86° and our normal low temperature is 65°.  These are 30 year averages.  So, all the high temperatures and low temperatures on July 25th from the years 1981 through 2010 were added up and divided by 30 to get the average.  Beginning in 2021, we will be basing our average temperatures from the years 1991 through 2020.

Lately you've probably heard us say temperatures are below average.  That is going to continue for at least the next week or so as temperatures are going to be in the mid 70s to lower 80s.  Looking ahead 8 to 14 days, temperatures should eventually reach back to normal territory.


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