Our climate and weather patterns have changed dramatically and so have the terms used to describe weather events. Forecasters and the media now use terms such as "atmospheric river", "polar vortex", and "heat dome" to describe meteorological events typically associated with extreme weather. Christmas tree growers are already dealing with the consequences of changes in weather patterns that have altered “normal” precipitation and temperature patterns in many production regions. Growers in areas experiencing drought and extreme heat have already encountered increasing problems related to seedling survival and direct heat damage to larger trees. Changes in our climate and weather patterns are also likely to affect disease development and the postharvest quality of trees. The ways in which climate and weather may affect fungal needle cast diseases, Phytophthora root rot, and postharvest needle retention will be discussed.