Human-induced climate change has become a significant influence on the hydrological cycle worldwide (Caretta et al., 2022), requiring water agencies to anticipate the effects in their planning. Typically, water agencies use climate models to anticipate future climate. But such models might underestimate the full scope of future climate conditions. Expert elicitation can provide another source of information that is useful for planning (Morgan, 2014). Our team at RAND Corporation helped the San Francisco Public Utilities Commission (SFPUC) use a Delphi-based expert elicitation to supplement climate model projections as inputs to its recent climate change adaptation planning process. This report describes that elicitation exercise and offers suggestions for how other agencies might use the approaches demonstrated here.