Abstract: A temperature sensing playpen assembly includes a base frame that may be positioned on a support surface. A child may be positioned within the base frame. A wall is coupled to and encloses the base frame. A pad is positionable on a floor of the base frame so the pad may cushion the floor of the base frame. A canopy frame is removably positionable on a top of the base frame. An umbrella is coupled to the canopy frame. A control panel is coupled to the base frame. An alarm is coupled to the control panel. The alarm is operationally coupled to the control panel. A pressure sensor is coupled to the pad. The pressure sensor is operationally coupled to the control panel. A temperature sensor is coupled to the canopy frame. The temperature sensor is operationally coupled to the alarm so the alarm emits an audible alarm.