Study Examines Climate Change in Major U.S. Cities

    SAN FRANCISCO, Sept. 12 /CNW/ -- WeatherBill released today a new climate
change study highlighting temperature changes across 130 U.S. cities, in 42
states, each with a population of at least 100,000. WeatherBill analyzed
thirty years of historical weather data from the National Weather Service
weather stations in these larger U.S. cities to determine trends in daily
average temperature. The study finds 57% of the cities show increasing winter
temperatures, especially in the Midwest.  The average annual winter
temperature increase across all 130 cities is 0.08 degrees F, which would
amount to 2.4 degrees F increase over thirty years.  Only 13% of the cities
studied show increasing summer temperatures, most notably cities in New
England.  A free copy of the study can be downloaded at
    During the winter (November-February) 74 of the 130 cities show
increasing temperatures, while only 2 cities, Los Angeles and San Diego, show
decreasing temperatures.  Fifty-four cities show no change in winter
temperature. Increases are most prevalent in Texas, Oklahoma, Louisiana,
Arkansas and in the Midwest.  Eight Midwestern cities, including Minneapolis,
Chicago, Milwaukee and Omaha show at least a 0.20 degrees F increase annually,
which adds up to 6.0 degrees F over a thirty year period.  Temperature
increases are noted in all U.S. regions except the Pacific.
    Changing temperature trends are far less prevalent in the summer (June-
September) when 85% of the cities analyzed show no change in temperature. Only
17 cities show increasing summer temperatures, most notably in New England. 
Boise, Hartford, Detroit and Las Vegas are seeing summer temperature increases
of at least 0.09 degrees F, which adds up to a 2.7 degrees F increase over
thirty years.  Reno is increasing 0.23 degrees F in the summer, which would
amount to 6.9 degrees F over thirty years.  Two cities show decreasing summer
temperatures: San Diego and Hampton, Virginia.
    Ten cities show increasing temperature trends in both winter and summer,
including Boise, Hartford, Detroit and Philadelphia.  San Diego is the only
city with decreasing temperatures in winter and summer.
    WeatherBill published this original study to help urban consumers and
businesses better understand local temperature trends for planning and risk
management.  Over 58 million people live in the larger cities studied, more
than 187 million live and work in the metropolitan areas, representing 62% of
the population.
    "Our weather sensitive clients in Agriculture, Construction,
Manufacturing & Retail and Travel & Leisure frequently ask us for detailed
weather insights and climate change impacts," says WeatherBill CEO David
Friedberg, "Now millions of businesses sensitive to temperature change can
make more accurate estimates of seasonal averages and plan for the business
impact accordingly."
    Business owners can also use the free tools at
to compare their financials to historical weather data for a more detailed
understanding of how weather may affect their business.  WeatherBill can also
help address changing weather by providing coverage to protect revenue and
control costs from its negative effects.
    WeatherBill, Inc. ( provides the only online service
that allows businesses to protect revenue and control costs from the impact of
bad weather.  Founded by former Googlers, CEO David Friedberg and CTO Siraj
Khaliq, WeatherBill is funded by New Enterprise Associates and Index Ventures
and backed by Nephila Capital, one of the world's largest weather risk and
catastrophe reinsurance fund managers.

For further information:

For further information: Regina Sinsky of WeatherBill, Inc., 
+1-415-762-4378, Web Site:  

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