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Here are seasonal precipitation and temperature forecasts issued by the International Research Institute for Climate and Society (IRI) for the period August-September-October 2012.

IRI uses a number of inputs for their forecasts, primarily several dynamical atmospheric prediction models that respond to the expected patterns in sea surface temperature (SST).

IRI is calling for normal late summer/early fall precipitation for most of the Southeast U.S. except for Mississippi, Alabama, and Northwest Florida where above-normal precipitation is forecast.
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Above-normal temperatures are expected over the entire Southeast U.S. Unfortunately, it looks like well-above-normal temperatures will continue to be centered over the Midwest.