Well, I guess it depends on what you're allergic to. I live in the Minneapolis Metro area and I am allergic year round to something. I don't know what it is. I have traveled from the tip of South America to 400 miles above the Arctic Circle. Same problem everywhere. So I think you are asking a generic question to a specific problem. If you are allergic to Pollen from hardwoods - avoiding Hardwood Forests during spring would help.