The normal body temperature for a 9-month-old baby is around 36 to 37 degrees Celsius. If the child has a fever, try physical cooling (cooling) and fluid intake first, but if the body temperature continues to rise or is accompanied by other symptoms, seek medical attention immediately. Additionally, teething can also cause slight fever, but if the temperature reaches or exceeds 38 degrees Celsius, it is recommended to see a doctor quickly to confirm the cause.