The NOAA data show that 2008, year to date, is a whopping 0.17F warmer than the average year to date temperature for the period 1895 to 2008.
More importantly, the year to date temperatures for 1998 to 2008 show a cooling trend of -0.84 degF / Decade and rapidly accelerating (downward).
The following chart can be replicated by visiting this NOAA page and selecting the following:
Period: Year to date
First Year to Display: 1998
Last Year to Display: 2008
Base Period, BegYear: 1895
Base Period, EndYear: 2008
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