The rain having stopped, English referee Michael Oliver allowed the players to undertake a brief warm-up on the pitch prior to restarting the game with a drop ball just before 10:00 PM local time (2000 GMT).
The score was 0-0 at the time of the stoppage.
Oliver had halted the match in Dortmund in the 35th minute, taking the players off the pitch amid torrential rain, hailstones, high winds, thunder and lightning.
Big screens inside the stadium informed the crowd of 60,000 that the game had been halted due to "adverse weather conditions".
Supporters in exposed seats were left to seek cover as water poured from the stadium's roof.
Fan zones in Dortmund were also closed due to the weather conditions, local police told SID, an AFP subsidiary.
