Oregon pollen and allergy seasons

July outlookHigh

Oregon has an early tree season and an intense grass season in the Willamette Valley in late spring and early summer.

Twelve month pollen calendar

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LowModerateHighVery high

Dominant species in July

Grass

Typical peak in July

early-July to mid-July

Worst month of the year

June

Best month of the year

January

What is active in July

Grass

High

Cities in Oregon

City	Today	Worst today	Typical in July
Portland	Very Highas of Jul 15	Grass	High
Medford	Very Highas of Jul 15	Grass	High
Bend	Very Highas of Jul 15	Grass	High
Gresham	Very Highas of Jul 15	Grass	High
Hillsboro	Very Highas of Jul 15	Grass	High
Beaverton	Very Highas of Jul 15	Grass	High
Albany	Very Highas of Jul 15	Grass	High
Tigard	Very Highas of Jul 15	Grass	High
Aloha	Very Highas of Jul 15	Grass	High
Lake Oswego	Very Highas of Jul 15	Grass	High
Oregon City	Very Highas of Jul 15	Grass	High
Redmond	Very Highas of Jul 15	Grass	High
West Linn	Very Highas of Jul 15	Grass	High
Ashland	Very Highas of Jul 15	Grass	High
Sherwood	Very Highas of Jul 15	Grass	High
Altamont	Very Highas of Jul 15	Grass	High
Cedar Mill	Very Highas of Jul 15	Grass	High
Canby	Very Highas of Jul 15	Grass	High
La Grande	Very Highas of Jul 15	Grass	High
Ontario	Very Highas of Jul 15	Grass	High
Damascus	Very Highas of Jul 15	Grass	High
La Pine	Very Highas of Jul 15	Grass	High
Sunriver	Very Highas of Jul 15	Grass	High
Veneta	Very Highas of Jul 15	Grass	High
Eagle Point	Very Highas of Jul 15	Grass	High
Astoria	Very Highas of Jul 15	Grass	High
Lincoln City	Very Highas of Jul 15	Grass	High
Yachats	Very Highas of Jul 15	Grass	High
Lakeview	Very Highas of Jul 15	Grass	High
Union	Very Highas of Jul 15	Grass	High
Turner	Very Highas of Jul 15	Grass	High
Gold Beach	Very Highas of Jul 15	Grass	High
Trail	Very Highas of Jul 15	Grass	High
Manzanita	Very Highas of Jul 15	Grass	High
Lacomb	Very Highas of Jul 15	Grass	High
Brownsville	Very Highas of Jul 15	Grass	High
Sublimity	Very Highas of Jul 15	Grass	High
Malin	Very Highas of Jul 15	Grass	High
Molalla	Very Highas of Jul 15	Grass	High
Westfir	Very Highas of Jul 15	Grass	High
Idleyld Park	Very Highas of Jul 15	Grass	High
Cascade Locks	Very Highas of Jul 15	Grass	High
Grand Ronde	Very Highas of Jul 15	Grass	High
Selma	Very Highas of Jul 15	Grass	High
Bandon	Very Highas of Jul 15	Grass	High
Carlton	Very Highas of Jul 15	Grass	High
Adel	Very Highas of Jul 15	Grass	High
Mapleton	Very Highas of Jul 15	Grass	High
Scio	Very Highas of Jul 15	Grass	High
Vernonia	Very Highas of Jul 15	Grass	High
Myrtle Creek	Very Highas of Jul 15	Grass	High
Newport	Very Highas of Jul 15	Grass	High
White City	Very Highas of Jul 15	Grass	High
Eugene	Highas of Jul 15	Grass	High
Springfield	Highas of Jul 15	Grass	High
Tualatin	Highas of Jul 15	Grass	High
Wilsonville	Highas of Jul 15	Grass	High
Oak Grove	Highas of Jul 15	Grass	High
St. Helens	Highas of Jul 15	Grass	High
Clackamas	Highas of Jul 15	Grass	High
Charleston	Highas of Jul 15	Grass	High
Cottage Grove	Highas of Jul 15	Grass	High
Ophir	Highas of Jul 15	Grass	High
Cheshire	Highas of Jul 15	Grass	High
Tangent	Highas of Jul 15	Grass	High
Philomath	Highas of Jul 15	Grass	High
Arch Cape	Highas of Jul 15	Grass	High
Saint Helens	Highas of Jul 15	Grass	High
Jacksonville	Highas of Jul 15	Grass	High
Silverton	Highas of Jul 15	Grass	High
Monroe	Highas of Jul 15	Grass	High
Salem	Moderateas of Jul 15	Grass	High
Corvallis	Moderateas of Jul 15	Grass	High
Grants Pass	Moderateas of Jul 15	Grass	High
Keizer	Moderateas of Jul 15	Grass	High
Mcminnville	Moderateas of Jul 15	Grass	High
Forest Grove	Moderateas of Jul 15	Grass	High
Newberg	Moderateas of Jul 15	Grass	High
Happy Valley	Moderateas of Jul 15	Grass	High
Roseburg	Moderateas of Jul 15	Mugwort	High
Hayesville	Moderateas of Jul 15	Grass	High
Klamath Falls	Moderateas of Jul 15	Grass	High
Hermiston	Moderateas of Jul 15	Grass	High
Lebanon	Moderateas of Jul 15	Grass	High
Pendleton	Moderateas of Jul 15	Grass	High
Troutdale	Moderateas of Jul 15	Grass	High
Cornelius	Moderateas of Jul 15	Grass	High
Sandy	Moderateas of Jul 15	Grass	High
Oatfield	Moderateas of Jul 15	Grass	High
Gladstone	Moderateas of Jul 15	Grass	High
Oak Hills	Moderateas of Jul 15	Grass	High
Prineville	Moderateas of Jul 15	Grass	High
Monmouth	Moderateas of Jul 15	Grass	High
Elsie	Moderateas of Jul 15	Grass	High
Three Rivers	Moderateas of Jul 15	Grass	High
Lafayette	Moderateas of Jul 15	Grass	High
Independence	Moderateas of Jul 15	Grass	High
Seaside	Moderateas of Jul 15	Grass	High
Warrenton	Moderateas of Jul 15	Grass	High
Mckenzie Bridge	Moderateas of Jul 15	Grass	High
Elmira	Moderateas of Jul 15	Grass	High
Estacada	Moderateas of Jul 15	Grass	High
Sheridan	Moderateas of Jul 15	Grass	High
New Hope	Moderateas of Jul 15	Grass	High
North Plains	Moderateas of Jul 15	Grass	High
Waldport	Moderateas of Jul 15	Grass	High
Applegate	Moderateas of Jul 15	Grass	High
Government Camp	Moderateas of Jul 15	Grass	High
Sutherlin	Moderateas of Jul 15	Grass	High
Tillamook	Moderateas of Jul 15	Grass	High
Jefferson	Moderateas of Jul 15	Grass	High
Mitchell	Moderateas of Jul 15	Grass	High
Hood River	Moderateas of Jul 15	Grass	High
North Bend	Moderateas of Jul 15	Grass	High
Marcola	Moderateas of Jul 15	Grass	High
Cannon Beach	Moderateas of Jul 15	Grass	High
Buxton	Moderateas of Jul 15	Grass	High
Johnson City	Moderateas of Jul 15	Grass	High
Toledo	Moderateas of Jul 15	Grass	High
Florence	Moderateas of Jul 15	Grass	High
Sisters	Lowas of Jul 15	Grass	High
Bethany	No live reading	Not available	High
Woodburn	No live reading	Not available	High
Milwaukie	No live reading	Not available	High
Central Point	No live reading	Not available	High
Dallas	No live reading	Not available	High
Four Corners	No live reading	Not available	High
The Dalles	No live reading	Not available	High
Coos Bay	No live reading	Not available	High
Madras	No live reading	Not available	High
Boring	No live reading	Not available	High
Boardman	No live reading	Not available	High
Mount Angel	No live reading	Not available	High
Aurora	No live reading	Not available	High
Creswell	No live reading	Not available	High
Aumsville	No live reading	Not available	High
Oceanside	No live reading	Not available	High
Pacific City	No live reading	Not available	High
Mountain View	No live reading	Not available	High
Brookings	No live reading	Not available	High
Stayton	No live reading	Not available	High
Eagle Creek	No live reading	Not available	High
Prairie City	No live reading	Not available	High
Hubbard	No live reading	Not available	High
Baker City	No live reading	Not available	High
Junction City	No live reading	Not available	High
Lyons	No live reading	Not available	High
Mulino	No live reading	Not available	High
Fairview	No live reading	Not available	High
Rockaway Beach	No live reading	Not available	High
South Beach	No live reading	Not available	High
Scappoose	No live reading	Not available	High

Today and worst today come from live readings where available. Typical shows the usual level for this month from the seasonal profile.

The Oregon allergy season

Allergy levels in Oregon peak in June, when grass pollen runs highest. The season moves through tree pollen around March, grass in June, weed pollen such as ragweed in August. Levels start to climb around February. The lowest pollen levels of the year arrive in January.

Common questions

When does allergy season start in Oregon?

Pollen levels in Oregon usually begin climbing in February and reach their highest point in June.

What is the worst month for allergies in Oregon?

June is typically the worst month in Oregon, driven by grass pollen.

When does ragweed season end in Oregon?

Ragweed pollen in Oregon usually fades by the end of September, after the first hard frost in colder areas.

When is the best time for allergies in Oregon?

January usually brings the lowest pollen levels of the year in Oregon.