Highest pollen counts of the season expected after Memorial Day weekend

Grass pollen is expected to remain high through the Fourth of July PORTLAND, Ore. (KOIN) — Pollen counts are heading towards their yearly peak after Memorial Day weekend. Allergy sufferers should prepare for the peak of allergy season in the weeks to come as the Willamette Valley’s grasses ramp up in pollen production. Western Oregon typically sees its highest pollen counts from Memorial Day to the Fourth of July. Each year’s pollen season varies with differing temperatures and rainy days. This year’s early season pollen counts could stay mild as...