
Norwegian sunset maple
Acer truncatum
Moderate today, mostly weed pollen.
Last updated August 15, 2026
Weed pollen is the main story in Seattle today, sitting at a moderate level that sensitive individuals will likely notice. Tree pollen is quiet, so if you're prone to reactions this time of year, it's the weeds worth paying attention to rather than anything coming from the region's trees. Looking ahead, weed pollen is expected to hold steady at a moderate level over the next several days, so those with sensitivities should expect similar conditions through the week. Tree pollen should remain absent for now, which lines up with the seasonal pattern — trees like linden, maple, oak, hornbeam, and sweetgum typically release their pollen in spring, well before late summer. This time of year in the Pacific Northwest, weeds tend to be the more persistent source of irritation as the season shifts toward fall.
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

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Acer griseum

Aristocrat pear
Pyrus calleryana

Blireiana purpleleaf plum
Prunus blireiana

Pacific sunset maple
Acer truncatum

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Prunus

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Acer rubrum

Frontier elm
Ulmus

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Prunus L.

Akebono cherry
Prunus yedoensis

Callery pear
Pyrus calleryana

October glory red maple
Acer rubrum

Spring snow cherry
Prunus

Chanticleer pear
Pyrus calleryana