Was October 24, 2026 allergy season over in Hillsboro?
NO
No — ragweed is still the allergen of the month around Portland, with weeks of fall allergy season left to run.
Why
- Ragweed in Portland had roughly 48 days left as of mid-October
- Local air quality moderate: US AQI 65, PM2.5 20.4 µg/m³
- Fall mold spores rise as wet leaves pile up