The Indian summer monsoon (ISM) is a complex system that plays a crucial role in the climate of South Asia. The Community Earth System Model 2‐Large Ensemble (CESM2‐LE) simulations are used to explore the forced response in the mean state and interannual variability of the ISM in future projections. Simulations during historical periods (1980–2009) show that the model could fairly reproduce the mean state and interannual varia...