With volatile supply chain issues involving many aspects of production ag these days, some are asking if it is wise to purchase bulk inventory of herbicides and/or other pesticides. The short answer is yes, it would be a good idea to start making purchases on some of these inputs.
The intent is not to hoard products but to have a modest supply for use during the next growing season. However, you must keep in mind appropriate storage parameters, namely issues regarding freezing of pesticide products during the winter months. In general, freezing temperatures can change and negatively affect the chemistry of some pesticides inside the container and can also damage the container itself.
Make sure to read the label for storage instructions. But as a rule, pesticides are best stored between 40-90 °F.
For more details and many useful links, please refer to the National Pesticide Information Center’s webpage about pesticide storage considerations. Other good articles about temperature effects during storage are from the University of Missouri and North Dakota State University.