The Intergovernmental Panel on Climate Change (IPCC) was founded in 1988 to provide governments with policy-relevant assessments of climate science as well as options for adaptation and mitigation. It is now recognized as providing the leading global compilation of climate science, adaptation, and mitigation research. The volunteer scientists who write these reports have carried out five complete assessment cycles, with the sixth cycle to be completed in 2022. Here, we review how information from and about archaeology and other forms of cultural heritage has been incorporated into these reports to date. Although this review shows that archaeology has not been wholly absent from work of the IPCC, we suggest that archaeology has more to offer the IPCC and global climate response. We propose five ways to more fully engage both archaeologists and knowledge from and about the human past in IPCC assessments and reports.