OVEN APPLIANCE HAVING A HUMIDITY SENSOR

An oven appliance, as provided herein, may include a cabinet, a ventilation fan, a sensor enclosure, a humidity sensor, and a sensor fan. The cabinet may define a cooking chamber and an oven vent downstream therefrom to direct an exhaust flow from the cooking chamber. The ventilation fan may be mounted to the cabinet downstream from the oven vent. The sensor enclosure may be mounted to the cabinet outside of the cooking chamber. The sensor enclosure may define an enclosed volume. The sensor enclosure may further define an active flow entrance and an active flow exit in fluid communication with the enclosed volume. The humidity sensor may be disposed within the enclosed volume. The sensor fan may be attached to the cabinet outside of the cooking chamber and upstream from the ventilation fan.