You can add the other months manually, or create a loop if the number of files dynamically growing.
and so on with the other months, then:
Load * from jan;
Load * from feb;
drop table jan, feb....;
Keep in mind tables with same columns will concatenated into one, If you have proper key for month as well this not cause any problem at the joining, If not prevent concatenate before the join. So Load -> Join -> Concatenate into one table then you can store.
For the solution with loops I suggest you to read through this thread: