2-3 months is nothing, Glass jars should be sufficient. I HIGHLY recommend you wrap your jars in foil. Light is the enemy#1, heat and air are #2 but at room temps its a ways down the list. If you were going longer I would recommend drying them till crispy and Jar, then refrigerate(freezing would be better but it concerns me with rupturing cell walls/etc so safest would be fridge, vaccume has gives me the same concern, but my fears may be unfounded and based on my experience with freezing other plant material). When you need some take out another jar, sprits them with one small spray of distilled water and let them sit for a few hours or a day in the jar they will rehydrate.
If you want to learn more about dedgradation of THC read the MJ growers handbook by mel frank/ed rosenthal they have charts that show various rates of degredation.
Also if you do anything to decarboxolize the thc it degrades faster (ie tinctures that you have heated or ediables).