Allergies & Pollen for Hillsboro, Oregon
9.9
High
Top Allergens:
Grass, Walnut
Discussion
Pollen concentrations for Monday will be falling but will remain in the high range. The cause for the falling pollen levels is falling temperatures, rising relative humidity and weaker winds.
Allergy Facts
Mountainous regions may serve as allergy havens. Their high altitude does not permit many allergenic plants to grow, and their isolated location reduces outside pollen contamination to a minimum. A vacation to the mountains during peak allergy season may be a good idea for individuals suffering from hay fever.