
London planetree
Platanus acerifolia
Low today, mostly tree pollen.
Last updated July 1, 2026
Grass pollen is the main driver in Corona today, sitting at a moderate level (3) and outpacing tree pollen, which remains low at 2. The forecast suggests grass will hold at moderate for one more day before easing to low (2) and staying there through the rest of the five-day window. That downward drift is typical timing, as late spring and early summer mark the seasonal peak for grass pollen. Tree species like Oak, Plane, Maple, Honeylocust, and Zelkova contribute little now, having largely passed their spring high point. No weed data is available today, though ragweed generally becomes a concern later, toward the end of summer and into fall.
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