
Norwegian sunset maple
Acer truncatum
Low today, mostly tree pollen.
Last updated September 30, 2026
Tree pollen is the main contributor to today's count in Seattle, though it remains low and should go unnoticed by most people. Weed pollen is present in only trace amounts, so overall conditions are mild and manageable for the vast majority of allergy sufferers. Looking ahead, tree pollen is expected to hold steady at a low level over the next couple of days, with weed pollen staying similarly quiet. This lines up with the seasonal pattern for late September, as the region's oak, maple, ash, and plane trees have largely wound down their pollen release, and grass pollen is well past its peak. Any lingering sensitivity this time of year tends to come from weeds rather than trees, but even that influence looks minimal for now.
Every dot is a tree near Seattle, colored by how allergenic it is. Click one for its details, and zoom in for a closer look.
The local tree genera behind today's pollen near Seattle. Each bar is that genus's share of the tree pollen.
1,235 pollen-relevant trees nearby drive today's tree-pollen reading.
Get to know the tree types growing around Seattle: what each looks like, how allergenic it is, and when it blooms.

Norwegian sunset maple
Acer truncatum

Thundercloud purpleleaf plum
Prunus cerasifera

Norway maple
Acer platanoides

Paperbark maple
Acer griseum

Aristocrat pear
Pyrus calleryana

Blireiana purpleleaf plum
Prunus blireiana

Pacific sunset maple
Acer truncatum

Cherry/plum/laurel
Prunus

Red maple
Acer rubrum

Frontier elm
Ulmus

Kwanzan flowering cherry
Prunus L.

Akebono cherry
Prunus yedoensis

Callery pear
Pyrus calleryana

October glory red maple
Acer rubrum

Spring snow cherry
Prunus

Chanticleer pear
Pyrus calleryana