by Conroy
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Do you prefer the weather of warm Miami or... |
Ask yourself this question: What
city has a better climate Miami or San Francisco? Anyone that’s read this blog
and in particular my earlier posts analyzing “the perfect climate” will know
that I favor the heat and sunshine of South Florida over the consistent cool of
Northern California. However, I was in Florida last week, first in Orlando and then
in Fort Lauderdale, and in keeping with what has been
a remarkably warm 2012 for
the eastern two-thirds of the United States, it was summer hot with highs at or
above 90 and more humidity than is normal for early April. I was on vacation
and glad for the summery temperatures
[1], but as I sweated under the afternoon sun
I did have to ask myself whether summer at Easter is really how I would define
my perfect climate.
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...temperate San Francisco? |
And judging by the many comments I received on my three previous Perfect Climate
posts, I’d say there is a strong sentiment regarding this topic. I defined what
I considered the perfect climate, but many readers have different preferences
(see a sampling of reader comments below).
This is the
fourth post in my “Perfect Climate” series.
To check out the
first three, use the following links:
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Fortunately, one of the benefits of the climate ranking system I developed is that it
can be adjusted for different tastes. I’d like to examine one such adjustment,
one that addresses the question I posed at the beginning of this post. But
first, a review of my ranking system.
Conroy’s Perfect Climate
Most people have their preferences for what makes a perfect climate,
but as I explained in
Part 1 I feel that temperature is the key factor and dominates humidity, and
other elements like sunshine, wind, and precipitation. When it comes to
temperature there are four variables to consider:
- mean annual temperature, the higher the better [2];
- the variance between the hottest month and the coldest month, the lower
this difference (the less extreme the seasonality) the better [3];
- the mean temperature for each month of the year, the more “comfortable”
the monthly mean the better (or stated another way: How comfortable is it at
any given time of the year?) [4]; and
- the mean diurnal temperature differences by month (the difference
between daily high and low), the lower the better because a comfortable daily
mean doesn’t mean much if actual daily temperatures vary greatly [5].
I use historical temperature data
[6] for a city and apply it to a formula
I developed
[7]
that yields a climate score
[8]. The higher the climate score, the better
the climate. I computed the score for nearly 500 places in the United States.
The top three climate scores are associated with Hilo, Hawaii, Honolulu, and
Key West. The three lowest scores belong to Nome, Fairbanks, and Barrow,
Alaska. I doubt that many people would quibble with these results. The ranking
of climate scores for the 30 largest U.S. metropolitan areas is provided in the
table below. For a full discussion of how I used the four temperature variables to quantify
the perfect climate, read
The Perfect Climate – Part 1 post, and for commentary
on the rankings see
The Perfect Climate – Part 2.
Climate Rankings for the 30
Largest Metropolitan Areas
|
Rank
|
Metropolitan Area
|
Climate Score
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1
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Miami, FL
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44.9
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2
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Tampa, FL
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37.8
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3
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Los Angeles, CA
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37.1
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4
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Orlando, FL
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36.4
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5
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San Diego, CA
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36.0
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6
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Houston, TX
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29.5
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7
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San Francisco, CA
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27.9
|
8
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Riverside, CA
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25.3
|
9
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San Antonio, TX
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23.9
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10
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Sacramento, CA
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22.4
|
11
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Phoenix, AZ
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21.0
|
12
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Dallas, TX
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18.0
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13
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Atlanta, GA
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16.6
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14
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Seattle, WA
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14.2
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15
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Portland, OR
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13.9
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16
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Las Vegas, NV
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13.0
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17
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Baltimore, MD
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9.9
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18
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Washington, DC
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9.0
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19
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Philadelphia, PA
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5.7
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20
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New York, NY
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4.3
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21
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Cincinnati, OH
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3.8
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22
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St. Louis, MO
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3.6
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23
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Kansas City, MO
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3.3
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24
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Boston, MA
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2.5
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25
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Chicago, IL
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1.3
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26
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Detroit, MI
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0.1
|
27
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Pittsburgh, PA
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0.1
|
28
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Cleveland, OH
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-0.2
|
29
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Denver, CO
|
-0.4
|
30
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Minneapolis, MN
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-12.6
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Honolulu is the number 1 big city in my original rankings |
After tweaking the formula, computing the climate scores, and analyzing the rankings, I was pleased.
The rankings more or less reflected my view of the perfect climate. In
particular, places in the hot and humid South and Southeast ranked high, as did
temperate California, and then places in the baking Southwest. The lowest
ranking places were (of course) freezing Alaska and the highly variable
Northern Great Plains.
After I published these rankings I reviewed where Americans have chosen
to live over the last half century and the results seem to validate my
thinking. People prefer warm winters to cool summers. People will endure high
summer heat to avoid freezing winter cold. See
The Perfect Climate – Part 3 for
more details on the correlation between climate and American demographic trends.
However, as pleased as I was at these results and despite how Americans seem to
have (and continue to) vote with their feet for the climates they choose to
live in, I received many critical comments on my system and the rankings,
including:
“I see that San Diego rates really high, and having spent a lot of time in
"America's Finest City", I can attest that it has an almost ideal
climate. I much prefer the dryer conditions there than the sticky humidity in
Florida.” – CT, Eugene, OR
“Wow! Having escaped Houston's oppressive humidity and 100ยบ heat even in June for
Denver's 300+ sunny days/year, I gotta pick my subjective observations over
your methodology for picking a place to live!” – Nowitall, Denver, CO
“Ill have to be honest with you about the Florida climate. I've lived in Florida for
about 12 years (in the Tampa area) and the climate is nothing to strive for.
The summers are absolutely brutal. April- October you have to deal with temps
above 90F with a lot of humidity. It’s not the heat as much as it is humidity.
Every summer morning I always walk my dog. In the morning it’s about 86F with
usually 90 percent humidity. 5 minutes outside and you’re pouring with sweat.”
– Anonymous, Tampa