
Pin oak
Quercus palustris
Low today, mostly weed pollen.
Last updated August 15, 2026
Weed pollen is the main story in Harlem today, though even that is running at a low level. Tree pollen is nearly absent, so the overall picture is mild and most people should get through the day without much irritation. Those who are especially sensitive to weeds may notice a slight effect outdoors, but it should be minor for the majority of residents. Looking ahead, this pattern is expected to hold steady over the next several days, with tree pollen staying very low and weeds remaining at a similarly light level. This lines up with the season: local trees like birch, oak, Prunus, Crataegus, and Koelreuteria have long finished their spring release, and any current weed activity is the early edge of what typically builds toward a more noticeable ragweed presence later in late summer and fall. For now, conditions remain calm and manageable across the city.
Every dot is a tree near Harlem, 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 Harlem. Each bar is that genus's share of the tree pollen.
1,284 pollen-relevant trees nearby drive today's tree-pollen reading.
Get to know the tree types growing around Harlem: what each looks like, how allergenic it is, and when it blooms.

Pin oak
Quercus palustris

Honeylocust
Gleditsia triacanthos

London planetree
Platanus acerifolia

Callery pear
Pyrus calleryana

Japanese zelkova
Zelkova serrata

Sophora
Styphnolobium japonicum

Maple
Acer

White oak
Quercus alba

Littleleaf linden
Tilia cordata

Austrian pine
Pinus nigra

Black oak
Quercus velutina

Ginkgo
Ginkgo biloba

Northern red oak
Quercus rubra

Green ash
Fraxinus pennsylvanica

Cherry
Prunus

Swamp white oak
Quercus bicolor