Climate　change　and　intensification　of　urban　heat　island　are　making　the　outdoor　environment　more　uncomfortable　during　hot　weather.　Improving　the　outdoor　thermal　comfort　of　urban　parks　is　crucial　for　residents’　health　due　to　their　significance　for　daily　activities.　Taking　Hot　Spring　Park　in　Fuzhou,　China,　as　an　example,　based　on　COMfort　FormulA　(COMFA)　model,　this　study　examined　the　outdoor　thermal　comfort　and　revealed　related　influencing　factors,　through　questionnaires,　field　measurement　of　meteorological　and　landscape　variables.　The　results　show　that　(1)　air　temperature　and　solar　radiation　are　the　most　important　variables　affecting　outdoor　thermal　comfort　while　wind　speed　and　relative　humidity　are　less　influential.　(2)　The　results　allow　extending　the　neutral　thermal　comfort　range　from　50　W/m2　(value　of　literature)　to　80　W/m2　in　hot　summer　and　warm　winter　areas.　However,　people　will　be　unbearable　when　the　value　of　COMFA　model　reaches　177　W/m2　or　higher.　(3)　Increasing　the　green　coverage　and　canopy　density　of　the　park　can　significantly　improve　outdoor　thermal　comfort,　and　open　water　surface　has　almost　no　positive　effect.　This　study　extended　the　understanding　of　outdoor　thermal　comfort　in　hot　summer　and　warm　winter　areas　and　can　provide　the　basis　for　the　design　of　urban　parks　and　the　improvement　of　outdoor　thermal　environment.　©　The　Author(s),　under　exclusive　licence　to　Springer-Verlag　GmbH　Austria,　part　of　Springer　Nature　2023.