Where have the seeds been stored? If they've been in a relatively cool environment for any amount of time already, that goes toward the cold stratification time.
In my experience (mostly vegetable/garden type plants, mind you) stratification can increase your chances of a seed sprouting greatly, but there's usually a small percentage that can manage to sprout without it, depending on the species and conditions of course. Plants native to drier, warmer climates tend to do better there, but your common juniper is well known for its adaptability to varying environments. Out of your 60, I imagine a couple should still sprout.
Any amount of stratification time will help increase your odds of course, so if you can pop them in the refrigerator for even a week or two, you'll get one or two more sprouts than without any stratification at all.