[bcrdukes]

What brand of beans are you buying? And are they whole bean, or pre-ground?

Any pre-ground coffee will go stale very fast. The moment it is ground, it starts to go stale and gets worse from there onwards.

I think an air tight container will help, but not by much. If you are buying freshly roasted coffee beans, general rule of thumb is that it is good for about 10 days, but will vary depending on your environment (i.e. heat/cold or humidity levels etc.)

Try to avoid buying big bags of coffee if you aren't going through the coffee within 10 days or so. Stick to smaller bags no more than 1lb. If you are taking longer than 10 days to finish a 1lb bag (give or take a few days) then you may want to reconsider your coffee regimen.