DSDR KB:

Here is a source of mortality, weather, and air pollution data for selected metropolitan areas in the United States. The time period covered is 1987-2000:

http://www.ihapss.jhsph.edu/data/data.htm

I am not certain how they created these files as exact dates of death are not available in public use files after 1989:

http://www.cdc.gov/nchs/about/major/dvs/NCHS_DataRelease.htm

If a single state will work for you, data for North Carolina are publicly available. Files from states do not have the confidentiality restrictions:

http://arc.irss.unc.edu/dvn/dv/NCVITAL/faces/SearchPage.jsp?mode=1&collectionId=545