Dry coughs seem to happen a lot in the early spring season as well as in late winter. Yes, it can be allergy-related but also seasonal. I am glad you posted information on how to get some relief from a dry cough. The warm water technique with lemon (and even a dash of honey) really does work. My husband is a leader in a well-known band and uses his voice an awful lot. During certain seasons he will develop a dry cough and drinking warm water really helps. We have always added the lemon and honey, as well as a few different herbs to aid in healing of any throat issues. This is a good reference article. Thanks for sharing your research.