In a small bowl, combine the ground cinnamon, nutmeg, cloves, ginger, and allspice.
Use a whisk or a fork to mix the spices thoroughly until they are well combined.
Transfer the spice mix to an airtight container or a spice jar with a tight-fitting lid.
Label your container with the date and contents for future reference.
Store your homemade pumpkin pie spice mix in a cool, dry place away from direct sunlight.
It should stay fresh for several months.