Air carrier Captain reported pushback from the gate prior to receiving the Final DG report. The Captain waited at the completion of pushback until the DG documents were received and acknowledged prior to taxi.

Narrative

Inadvertently pushed back without final DG report. Threats included late arrival at airport due to traffic and hurricane. We arrived at the aircraft 35 minutes prior to push. Since we were time compressed; I set up the cockpit while the First Officer (FO) did the walk around which is not our normal flow. During initialization I received a planned DG report indicating dry ice. I printed the report and placed it between the thrust levers as a reminder to myself; due to distractions (briefing the purser; speaking to gate agent; etc.) I failed to mention the planned DG to the FO. When all doors were closed; purser indicated cabin ready and headset operator indicating he was ready to push we completed the before push checklist and i released the parking brake and told the headset operator brakes released; standby" after we got pushback clearance from ground control and commenced pushback I realized we had neither final weights or final DG report. I queried the headset operator and he told me the ramp was in the process of closing out the flight. I also called operations and was advised that due to the weather the ramp was running late. We completed the pushback and we did not start engines until we received the final DG report and sent the code. I should have briefed the FO on the planned DG but I allowed myself to get distracted. I will redouble my efforts to make sure that does not occur again."