NBC dominates rivals but hits second lowest viewership for Rio Olympics

Iconic Olympics ads through the years
Iconic Olympics ads through the years

NBC is still bringing in big ratings for its coverage of the Rio Olympics, but the network hit its second lowest viewership of the games so far Wednesday night.

The network's primetime coverage drew 20.7 million viewers on Wednesday from 8 p.m. to 11 p.m. ET, according to the network. This is just above the 20.6 million that watched NBC's primetime coverage on the first night of competition Saturday, August 6. But it was well below the 29.1 million who watched the same night in 2012 during the London games.

Wednesday night's coverage, which included track and field, beach volleyball and diving, also netted the lowest rating of these Olympics for those in the 18-to 49 year old demo, with a 5.8.

Related: NBC nabs silver for second best night of Rio ratings, but has tough road ahead

Even though these ratings were relatively low compared to London, NBC is still beating its broadcast rivals by a hefty margin.

After 13 days of Olympics coverage, NBC during primetime has averaged 26.7 million viewers. That's 256% more than ABC, CBS, and Fox combined.

NBC's coverage of the Rio Olympics comes to a close on Sunday.

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