Urbanization　has　resulted　in　dry/wet　island　effects　in　built-up　areas.　Compared　to　the　limited　number　of　observational　datasets,　simulations　can　provide　data　with　richer　spatial　distribution,　thereby　proving　to　be　more　helpful　for　revealing　the　spatial　distribution　of　dry/wet　islands.　This　study　simulated　dry/wet　island　effects　during　typical　summer　and　winter　conditions　in　Beijing　by　coupling　the　Artificial　Water　Dissipation　Urban　Canopy　Model　with　the　Weather　Research　and　Forecasting　model.　Observations　of　relative　humidity,　absolute　humidity,　and　temperature　from　weather　stations　in　Beijing　were　used　to　verify　the　model.　The　results　showed　that　in　2020,　Beijing　was　prone　to　be　a　dry　island　during　summer,　with　the　relative　humidity　approximately　5-10%　lower　than　the　surrounding　suburbs.　The　dry　island　effect　was　not　obvious　in　winter,　and　Beijing　tended　to　be　a　wet　island.　The　influence　of　artificial　water　dissipation　on　dry/wet　islands　is　higher　in　winter　than　in　summer.　By　considering　the　water　vapor　from　artificial　water　dissipation,　humidity　in　urban　areas　can　be　simulated　more　accurately.