This page provides access to the data files noted in the report titled Guide to Determining Climate Zone by County: IECC and Building America 2021 Updates. The data files provided here include GIS shapefiles for the 2021 IECC and Building America climate zone maps, along with GIS shapefiles for the pre-2021 IECC and Building America climate zones.
You can also find the full report here: https://doi.org/10.2172/1893981.
Antonopoulos, C., T. Gilbride, E. Margiotta, and C. Kaltreider. 2022. Guide to Determining Climate Zone by County: Building America and IECC 2021 Updates. PNNL-33270. Richland, WA: Pacific Northwest National Laboratory. https://doi.org/10.2172/1893981.