Sunday, August 1, 2010

Is it Normal to be Normal?

Lincoln, Nebraska:

The observed average temperature for July 2010 was 77.8 F.
The "normal" July average temperature is 77.8 F.
Therefore, July 2010 average temperature was in fact "normal".

However, how often does this occur?
That is, how often is the monthly average temperature normal?

The answer: NOT OFTEN!

Here is a table listing the number of months that were normal:

January (1887-2010: 124 years): Never
February (1887-2010: 124 years): 2 times (2010 and 1918)
March (1887-2010: 124 years): 3 times (1995, 1983, 1933)
April (1887-2010: 124 years): 2 times (1923, 1901)
May (1887-2010: 124 years): 1 time (2005)
June (1887-2010: 124 years): 1 time (1937)
July (1887-2010: 124 years): 4 times (2010, 1988, 1943, 1941)
August (1887-2009: 123 years): 3 times (1969, 1965, 1912)
September (1887-2009: 123 years): Never
October (1887-2009: 123 years): Never
November (1887-2009: 123 years): 1 time (1892)
December (1887-2009: 123 years): 1 time (1966)

Out of 1,483 separate monthly averages
(beginning in January 1887 and ending in July 2010),
only 18 months had "Normal" average temperatures.

That is Lincoln's monthly average temperature was normal
only 1% of the time

And, here is a link to the entire month by month data table.

http://www.lincolnweather.org/lincoln-monthly-temps-vs-normals.html

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