The U.S. southern border saw its highest rate of illegal migrant encounters last month, blowing away previous statistics.

Sources with Customs and Border Patrol told Fox News Digital that migrant encounters hit a staggering 300,000 incidents in the last month of 2023, reaching a level thought unimaginable just years ago.

Between Dec. 1 and December 31, more than 302,000 migrants were documented attempting to cross the U.S. southern border. 

It is the highest total for a single month ever recorded. It is also the first time migrant encounters have exceeded 300,000.