63,852 passengers used Knock in September, an increase of just under 6% from last year. I would say that is probably the busiest September ever at the airport, certainly busier than any of the previous three at least.
Knock will probably pick up some additional traffic from Galway over the winter months, however if the post on the Aer Arann thread about winter bookings is correct there won't be much impact at Knock from that decision.