
London planetree
Platanus acerifolia
Low today, mostly weed pollen.
Last updated August 15, 2026
Weed pollen is the most active type in Corona today, though overall levels remain low. Tree pollen is barely registering at this point in the season, so most people should notice little to no irritation from either source. For those especially sensitive to weeds, there may be a slight effect outdoors, but conditions overall are mild and manageable. Looking ahead, tree pollen is expected to stay quiet through the next several days, which fits the calendar since species like oak, willow, and cherry have long finished their spring release. Weed pollen will likely hover at similarly low levels, with only minor day-to-day fluctuation. This stretch of mid-August is typically a calmer period before ragweed and other late-season weeds begin to build heading into fall, so anyone prone to seasonal symptoms can expect a relatively easy few days.
Every dot is a tree near Corona, 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 Corona. Each bar is that genus's share of the tree pollen.
908 pollen-relevant trees nearby drive today's tree-pollen reading.
Get to know the tree types growing around Corona: what each looks like, how allergenic it is, and when it blooms.

London planetree
Platanus acerifolia

Honeylocust
Gleditsia triacanthos

Cherry
Prunus

Pin oak
Quercus palustris

Callery pear
Pyrus calleryana

Japanese zelkova
Zelkova serrata

Norway maple
Acer platanoides

Sophora
Styphnolobium japonicum

American linden
Tilia americana

Swamp white oak
Quercus bicolor

Sweetgum
Liquidambar styraciflua

Ginkgo
Ginkgo biloba

Littleleaf linden
Tilia cordata

Green ash
Fraxinus pennsylvanica

Kentucky coffeetree
Gymnocladus dioicus

Leaf plum purple
Prunus cerasifera