Temperatures were logged at six hypothetical body discovery sites during a 7-day period for which a hypothetical body lay in situ, along with a further four correlation periods. Correlation period temperatures and the Melbourne Regional Office (MRO) weather station temperatures were used to produce linear regression equations for the six sites. "Body in situ" period temperatures for each site were then retrospectively predicted by correcting MRO weather data recorded during the "body in situ" period. The accuracy of these estimates was assessed by comparing estimated temperatures with actual temperatures collected during the "body in situ" period. Two hypothetical case studies were also constructed to investigate the potential errors in estimating the postmortem interval (PMI) that may occur when using weather data from each of the correlations. Weather data that were retrospectively corrected by using the correlation method usually provided a more accurate representation of site temperatures during the "body in situ" period than uncorrected data, regardless of time after body removal. Additional similar research would help to show the strengths and weaknesses of retrospective weather data correction. 6 tables, 3 figures, and 24 references