The impacts of climate change are becoming increasingly evident, with more frequent, more intense rainfall events and rising temperatures that potentially can affect building envelope performance and durability. Evaluating the hygrothermal performance of building envelopes under future climate projections is essential for both the retrofit of existing buildings and the design of climate resilient new buildings. Although moisture-induced failures of exterior walls are a common issue in Turkiye, the hygrothermal performance of external walls under future climate projections has not been explored for any climate region of the country. The response of building envelope components to future climate loads based on hygrothermal performance indicators and damage prediction models are a key element to predicting climate change impacts on building envelopes. In this study, performance indicators were established for assessing the hygrothermal performance of building envelopes using HAM models. North American and European standards were reviewed to identify the relevant hygrothermal performance indicators and related threshold values. Additionally, a review of literature was completed that focused on simulating the hygrothermal performance of external walls to verify the damage prediction models used and related performance indicators in relation to wall assembly types examined. A national moisture control standard is available in Germany whereas European standards for hygrothermal performance assessment are valid across the EU as well as in Turkiye. Performance indicators such as mould growth index, wood deterioration, and frost risk damage are widely used and often integrated in the HAM models post-processing tools. In this study, the importance of hygrothermal performance indicators for predicting the impacts of climate change on building envelopes is highlighted as a useful approach to advancing resilient design practices.