
London planetree
Platanus acerifolia
Very low today, mostly weed pollen.
Last updated September 29, 2026
Pollen levels in Richmond Hill are quiet today. Tree pollen is absent entirely, and weeds are barely registering, sitting at a very low level. Overall, this is about as calm as conditions get, and most people, even those with sensitivities, should notice little to no effect today. Looking ahead, tree pollen is expected to stay flat at zero over the next several days, which fits the season since local varieties like Plane, Maple, Pyrus, Linden, and Oak have long finished their spring release. Weed pollen, on the other hand, is likely to edge upward gradually, moving from very low into a more moderate range by midweek. This is typical for early autumn, when ragweed and related weeds tend to linger before tapering off as cooler weather sets in, so those sensitive to weed pollen may want to keep an eye on the shift over the coming days.
Every dot is a tree near Richmond Hill, 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 Richmond Hill. Each bar is that genus's share of the tree pollen.
1,082 pollen-relevant trees nearby drive today's tree-pollen reading.
Get to know the tree types growing around Richmond Hill: what each looks like, how allergenic it is, and when it blooms.

London planetree
Platanus acerifolia

Callery pear
Pyrus calleryana

Cherry
Prunus

Honeylocust
Gleditsia triacanthos

Pin oak
Quercus palustris

Norway maple
Acer platanoides

Littleleaf linden
Tilia cordata

Red maple
Acer rubrum

Chokecherry
Prunus virginiana

Crimson king maple
Acer platanoides

Japanese zelkova
Zelkova serrata

Leaf plum purple
Prunus cerasifera

Sophora
Styphnolobium japonicum

Silver maple
Acer saccharinum

Ginkgo
Ginkgo biloba

American linden
Tilia americana