Central Texas has a year-long allergy season! We can only deal with the primary triggers at whatever time of year. Should you see the seasonal chart, it would look to you like the Himalayas, with Everest representing our winter cedar fever.
Because temperatures go to such extremes here, and quite suddenly, we're either fighting pollen or mold, or both. Indoor air can be more polluted than outdoor air, so airing the house out daily helps keep things in check.