RE: [gardeners] New hardiness zones -- get the fan

Terry (
Thu, 29 May 2003 10:25:27 -0700

The thing is, as soon as they officially publish that map the winter temps
will drop to what they used to be in the winter. ;p

As I read more about how the map was compiled I see they used temperatures
from 1986 to 2001.  We moved to this area in 1990.  Since we have lived here
the temperature as been as low as -30 during the coldest winter and only
down to about 11 above during the warmest winter.  With the warming winters
we've had less sunshine and more fog.  I hate long, seemingly unending days
of fog.  That's one of the reasons we moved here, to get out of the coastal

I was just dinking around looking at NOAA 113 year records. It was
interesting to note that in 112 years the mean winter temperature in Spokane
WA only increased .11 degrees.  If I look at the 1986 to 2001 the mean
winter temperature increase is a whooping .78 degrees.  So it appears this
new hardiness map could be based on too small of a sample to be helpful in
the long term.
Incidentally, the mean annual temperature for Washington State increased .04
degrees since 1895 to 2002 and decreased .38 degrees from 1986 to 2001. 

The mean annual temperature for Arizona increased .09 degrees from 1895 to
2002 and .84 degrees from 1986 to 2001.

For Boise, the mean annual temperature increased .21 from 1940 to 2002 and
.94 degrees from 1986 to 2001.

Nationally, the mean winter temperatures has trended upwards .15 degrees
since 1896 and 1.06 degrees from 1986 to 2001.  Mean spring temperatures
increased .11 degrees from 1985 to 2002 and trended to decrease .64 degrees
from 1986 - 2001.  The annual mean temperature trended to increase .10
degree 1985 - 2002 and trended to increased .31 1986-2001

Although I'm no statistician, looking at the over all picture (most of which
I haven't posted) If anything can be said it is that temperatures are
moderating across the country with winters getting noticeably warmer,
summers getting very slightly warmer, spring & fall getting noticeably


-----Original Message-----
[] On Behalf Of Zelhart Alan-rpcs30
Sent: Thursday, May 29, 2003 7:36 AM
Subject: RE: [gardeners] New hardiness zones -- get the fan

They moved us to zone 10!  From 9!  What are you crying about?  It was 110
degrees here yesterday!!! ;)

Chat with you later,
Chandler, Arizona        Sunset Zone: 13
Alan Zelhart
Gardens Co-listowner
  Common sense is the collection of prejudices acquired by age eighteen.

-----Original Message-----
From: Terry []
Sent: Thursday, May 29, 2003 7:27 AM
Subject: RE: [gardeners] New hardiness zones -- get the fan

Egad!  They've moved me to zone 6!  They used to have me in zone 5 and I've
always had to move down to zone 4 when buying plants to get them to survive.
Granted, we haven't had a zone 4 winter for several years and this past
winter our low was the lowest it has been since this drought started, only
down to -11.  I wonder if they have based this map only on the past 4 or 5
year's weather?


-----Original Message-----
[] On Behalf Of Margaret Lauterbach
Sent: Tuesday, May 27, 2003 12:43 PM
Subject: [gardeners] New hardiness zones -- get the fan

Bring out the fans.  The USDA has decided we're all several degrees warmer 
than we thought we were.  Two months ago, I was in zone 6, now I'm in zone 
7, having not moved an inch.  They've dropped the a and b parts of the 
zones.  I don't know whether the USDA checked with their boss about this 
warmer situation (didn't he deny the globe was warmer?), but they have also 
dropped Canada and Mexico as part of the zone map.  See it at 
.  Margaret L