Urban　artificial　water　dissipation　is　a　concomitant　process　of　human　water　use　in　built-up　areas　that　can　absorb　heat　through　evapotranspiration,　reduce　air　temperature,　transfer　surface　water　to　the　atmosphere,　and　participate　in　the　urban　water　cycle.　In　the　context　of　increased　urbanization,　the　impact　of　artificial　water　dissipation　on　urban　climates　cannot　be　ignored.　In　this　study,　calculation　models　for　artificial　water　dissipation　from　different　underlying　surface　types　(buildings,　hardened　ground,　soil,　and　vegetation)　were　introduced　into　an　urban　canopy　model　and　coupled　with　the　weather　research　and　forecasting　(WRF)　model　for　mesoscale　weather　simulations　of　the　Beijing　area.　Observational　datasets　of　temperature　and　humidity　from　automatic　weather　stations　in　Beijing　were　used　for　validation.　Results　showed　that　the　coupled　model　could　reproduce　the　temperature　and　humidity　of　urban　weather　stations　in　Beijing　more　accurately　compared　to　simulations　that　did　not　employ　an　urban　canopy　model　or　that　adopted　a　traditional　urban　canopy　model.　In　the　Beijing　urban　area,　the　latent　heat　flux　of　NON,　urban　canopy　model,　and　artificial　water　dissipation　into　the　UCM　are　approximately　0,　35,　and　65　W/m2,　respectively,　and　the　anthropogenic　latent　heat　is　about　30　W/m2.　Incorporating　urban　artificial　water　dissipation　into　the　urban　canopy　model　reduced　the　urban　air　temperature　by　0.2°C　and　increased　the　specific　humidity　by　0.6 g/kg,　alleviating　urban　heat　island　effects　and　increasing　humidity.　These　findings　indicate　that　artificial　urban　water　dissipation　plays　an　important　role　in　urban　weather　and　climate　that　should　be　considered　by　urban　canopy　models.　In　the　future,　this　model　can　be　coupled　into　WRF　for　more　accurate　mesoscale　weather　simulations.　©　2022　John　Wiley　&　Sons　Ltd.