Bad news for anyone with seasonal allergies: Portland is among the worst cities for grass pollen in the United States this year.
A 2026 report by the Asthma and Allergy Foundation of America has Portland as the No. 8 city for grass pollen. Seattle ranked third, just behind San Francisco and San Diego.
The AAFA recommends those with allergies spend limited time outdoors when pollen is high, keep lawns short, close windows during peak pollen times and shower at night to remove pollen…