So far we have only discussed parchment coffee, but green coffee beans (that is, beans with the papery parchment skin removed in hulling) more easily absorb moisture from the air. So there’s a greater risk of green coffee taking on moisture during storage. For this reason, it’s even more important to keep green coffee beans in a dry, temperature-controlled location.

If green coffee has a humidity greater than 12%, it’s an indicator that it wasn’t properly dried or stored. You can’t simply put green beans back on beds to dry for longer because it can damage the grain. So make sure to set up a sampling schedule and keep green beans in the correct conditions.

Tracking Moisture Levels

Record the humidity level each time you take it to keep track of whether the beans are taking on more moisture over time. This will help you identify whether there are problems in your drying method or storage space.