with John Maunder
Temperatures have been recorded in the Tauranga area at several sites during 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 the months of March from 1913-2019.
March 1947 is not included because of incomplete data.
The average daily maximum temperature for March 2019 was 23.9 degrees Celsius, the eighth warmest on record.
The long-term average afternoon temperature in March for Tauranga is 22.5 degrees Celsius, ranging from the cool March months of 1960 with an average afternoon temperature of 20.4 degrees Celsius, and 1940 with an average afternoon temperature of 20.8 degrees Celsius, to the warm March months of 1916 (24.7 degrees Celsius), and 1938 and 1968 (24.6 degrees Celsius).
The graph of the average afternoon temperatures for March shows generally normal variations from March to March but with some warming over the last 20 years .
From 1913 to 2019, there have been twelve March months with an average afternoon temperature of 23.7 degrees Celsius or more, and 13 March months with an average afternoon temperature of 21.5 degrees Celsius or less.
The nine warmest March months – in terms of average afternoon temperatures on record –in chronological order are: 1913, 1914,1916, 1938, 1968, 2005, 2010, 2013, and 2019..
In contrast the 13 coolest March months – in terms of afternoon temperatures on record –in chronological order are: 1923, 1934,1936, 1940, 1944, 1945, 1949, 1960, 1974, 1976, 1992, 1993 and 1998.
The average afternoon temperature for March for the 48 years from 1914-1962 was 22.4 degrees Celsius, compared with an average of 22.6 degrees Celsius for the 48 years from 1963-2011.
For further information see the following textbooks books (all available at specialised libraries)
"The Value of the Weather" (1970), "The Uncertainty Business - Risks and Opportunities in Weather and Climate" (1986), "The Human Impact of Climate Uncertainty - Weather Information, Economic Planning, and Business Management " (1989), all by W.J.Maunder