Ari Yehoshua Weiss was born on October 22, 1980 in Dallas, Texas to Stewart and Suzie. In 1992 the family made aliya and settled in Ra'anana. Ari attended the State-Religious Elementary School Yavneh and then the Bnei Akiva Yeshiva in Ra'anana. He completed his high school studies at Midrasiyat Noam in Kfar Saba and then studied at the pre-military yeshiva in Safed.
In July 2000 Ari was drafted into the IDF and served in the Engineer's unit of Nahal. On September 30, 2002, during a raid on Hamas headquarters in Shechem (Nablus) Ari was killed by a sniper. He was buried in the military cemetery in Ra'anana.