
Red maple
Acer rubrum
Moderate today, mostly weed pollen.
Last updated September 30, 2026
Weed pollen is the main story in Washington today, sitting at a moderate level that sensitive individuals will likely notice. Grass is barely present, and tree pollen is essentially absent right now, so any irritation you feel is almost certainly weed-related rather than coming from trees or grasses. Over the next couple of days, weed pollen is expected to climb into the high range before easing back toward moderate and then dropping off sharply. This lines up with the typical seasonal pattern, since ragweed and other weeds tend to peak in late summer into fall. Grass should remain very low throughout, and tree pollen is expected to stay quiet for now — trees like zelkova, linden, sweetgum, hackberry, and elm won't become active again until closer to spring.
Every dot is a tree near Washington, 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 Washington. Each bar is that genus's share of the tree pollen.
1,129 pollen-relevant trees nearby drive today's tree-pollen reading.
Get to know the tree types growing around Washington: what each looks like, how allergenic it is, and when it blooms.

Red maple
Acer rubrum

Willow oak
Quercus phellos

American elm
Ulmus americana

Cherry
Prunus

Pin oak
Quercus palustris

Red oak
Quercus rubra

Chokecherry
Prunus virginiana

Japanese zelkova
Zelkova serrata

London plane tree
Platanus acerifolia

American sycamore
Platanus occidentalis

Swamp white oak
Quercus bicolor

Okame cherry
Prunus L.

Rotundiloba sweetgum
Liquidambar L.

Kwanzan cherry
Prunus serrulata

Maple
Acer

Hedge maple
Acer campestre