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Weather Trends: September 2013
The National Retail Federation definition of September 2013 shifts the month one week later in the calendar when compared to 2012. This shift introduces a significant cooler bias in the forecast. Therefore, while the nation on a year-on-year basis trends cooler, most of that will be due to a calendar shift and not a change in the weather. Conditions are expected to be similar to 2012 when the shift is removed.