Staffel of JG 54 until his return on 15 September 1943. On 2 August 1943, he was awarded the German Cross in Gold (). On 28 September, Weiß was appointed Staffelkapitän of 10.
Weiß served as a squadron leader with JG 54 until his return on 15 September 1943. He received the German Cross in Gold () on August 2, 1943, and later became the commander of Squadron 10 on September 28.