with John Maunder
Temperatures have been recorded in the Tauranga area at several sites in the last 100 years, including the current Tauranga Airport site from June 1990.
The graph shows details of the average daily maximum temperatures (called simply ‘afternoon') for Tauranga for October from 1913-2019.
The average afternoon temperature for October 2019 for Tauranga was 18.5 degrees C, which was just 0.4 degrees milder than the average over the last 95 years.
The long-term average afternoon temperature in October for Tauranga is 18.1 degrees Celsius, ranging from the cool October months of 1964 (15.7 degrees Celsius), and 1992 (16.5 degrees Celsius), to the warm October months of 2013 (20.3 degrees Celsius), and 1915 (19.9 degrees Celsius).
The graph of the average afternoon temperatures for October shows generally normal variations from October to October during the last 100 years.
The average October afternoon temperatures during the 50 years from 1963-2011 of 18.0 degrees Celsius is slightly cooler than the 18.3 degrees Celsius recorded in the 50 years from 1914-1961.
From 1913 to 2018, there have been fifteen October months with an average afternoon temperature of 19.0 degrees Celsius or more; and eight October months have had an average afternoon temperature of 17.0 degrees Celsius or less.
The five warmest October months (in terms of afternoon temperatures), on record, in chronological order, are 1913, 1915, 1940, 2013, and 2015.
By contrast, the fifth coolest October months (in terms of afternoon temperatures), on record, in chronological order, are 1941, 1964, 1978, 1982, and 1992.
For further information see: https://sites.google.com/images/climatediceandthebutterfly/
The physicist Leo Szilard once announced to his friend Hans Bethe that he was thinking of keeping a diary: 'I don't intend to publish, I am merely going to record the facts for the information of God.' 'Don't you think God knows the facts?' Bethe asked. 'Yes' said Szilard. ‘He knows the facts, but he does not know THIS version of the facts'
"(From Hans Christian von Baeyer, "Taming the Atom" (from the preface paragraph in "A Short History of Nearly Everything", by Bill Bryson, A Black Swan Book, 2004)