A method (100) for producing a temperature sensor (200), the method (100) comprising: providing (101) a cable (103), wherein electrical conductor portions (105) are protruding from an end of the cable (103); connecting (107) at least one temperature sensor element (109) to the electrical conductor portions (105) protruding from the cable (103); providing (111) a sensor capsule (113); connecting (115) a proximal end surface of the sensor capsule (113) to the end of the cable (103), so that the sensor capsule (113) surrounds the at least one temperature sensor element (109); providing (117) at least one drain opening (119) in the sensor capsule (113) near a connection area (121) of the cable (103) and the sensor capsule (113); filling (123) up a volume (125) of the sensor capsule (113) with a thermally conducting ceramic filler (127); connecting (129) an end cap (131) to a distal end surface (133) of the sensor capsule (113); sealing (135) the drain opening (119).