Manufacturing of medical devices

Monitoring temperature and humidity at warehouse (plasti granules/polymers) depends on the symbols that are on the packaging of plastic granules. If there is a symbol for temperature range specifically stated (eg. 5-30C), than you need to monitor temperature. If there is no such a symbol, you are not obliged to monitor this elements. According to the ISO 13485:2016 clause 7.5.11 Preservation of product, you must protect your material from alteration, contamination or damage when exposed to expected conditions. 

We have a procedure for Warehouse in our toolkit. The content you can see on the following link: 

https://advisera.com/13485academy/documentation/warehousing-procedure-iso-13485-2016/