A repair crew had to string barbed wire along the two downed sections of fence, which measured 30 (98.4 feet) and 192 meters (630 feet) in length.
Damage to the border fence is not unusual during the rainy season on the Korean Peninsula and permanent repairs will be made when the weather dries out, South Korea's Yonhap news agency said.
Drier weather will be welcome in the soggy areas north of Seoul. Yonhap said up to 272 millimeters (10.7 inches) of rain fell in Gyeonggi Province fell over the weekend, and Yeoncheon County picked up 100 millimeters (3.9 inches) in one hour early Sunday.
The rains caused landslides and flash floods. Two people died when they were swept away by rushing water in two separate incidents in Gapyeong and Pocheon.