zoning in the Pacific

AW awilson@avonia.com
Thu, 14 Feb 2013 22:13:04 PST

Here is a set of data that provides the average minimum temperatures for
quite a few cities, including both Auckland and Wellington. 
Indeed, as you'd expect, the minimum temperature each month is a bit lower
in Wellington. Unfortunately, I could not find the lowest temperatures and
presumably the person who put together the hardiness zone maps had such
data. Nevertheless, I'd still expect Auckland, surrounded by so much
influence from the sea to be subject to a smaller range of temperature and
probably a higher values for the range of minimum temperatures (the basis
for the hardiness definition). 

San Diego (in Zone 10 b - but it varies quite a lot over its hilly terrain
and distance from the ocean)

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