UNDATED (WTVB) - If you have fall allergies, you know how miserable this otherwise lovely time of the year can be.  And health professionals say just because you haven't had them in the past, doesn't mean that autumn allergies won't creep up to get you soon. Allergist Doctor Eugene Hurwitz also says fall allergies are mostly affected by one thing  --  rag weed.  Current moisture in the air has ragweed and mold spores exploding in growth.  But take heart; the ragweed season will end after a couple consecutive days of freezing temperatures.