If you have an allergy that never ends when seasons change, you may be allergic to the spores of molds or other fungi.
Molds live everywhere, and disturbing a mold source can disperse the spores into the air.
Mold and mildew are fungi. They differ from plants or animals in how they reproduce and grow. Some spores are released in dry, windy weather. Others are released with the fog or dew when humidity is high. Inhaling the spores causes allergic reactions in some people.