It marks the first time Univision – or any network broadcasting in a language other than English – has topped its rivals in what the industry calls a "sweeps" period: a month when ratings company Nielsen compiles detailed viewing data to guide advertisers.

"Obviously, it´s an historic milestone for Univision, and frankly for Spanish-language media in general," network president Cesar Conde said. "It was a pretty substantial win."

Univision outrated NBC in the young demographic in February, but that was depicted more as a sign of NBC´s weakness than Univision´s strength. This month, Univision has continued to air all original programming while more reruns dot the schedules of English broadcasters.

The youth awards show, "Premios Juventud," had a duet between Jennifer Lopez and Pitbull at its opening and reached nearly 5 million viewers. Univision also benefited from some popular soccer matches and its 9 p.m. EDT telenovela, "Amores Verdaderos."

For television networks, the months of June and July are usually the lowest in viewership and correspond to the off-season

Univision, which is heavily watched for its soap operas, emphasized that programs such as "Despierta America," "Primer Impacto" and "El Gordo y la Flaca," as well as sports and news broadcasts, have experienced an increase in average viewership.