I figured it out using a While loop and an If statement with a counter. This solution uses functions from Advanced Custom Fields;
$i = 0;
while have_rows('week_rows') ): the_row();
$i++;
if( $i == 5 ) { // stops on the 5th row of 'week_rows' array
break;
}
endwhile; // I had to move the endwhile up before my display statements
// add display statements here to display array contents from 5th array row
?>