
London planetree
Platanus acerifolia
Very low today, mostly grass pollen.
Last updated July 9, 2026
Pollen levels in Corona are quiet today. Tree pollen is absent, and grass pollen is running very low, so overall conditions are about as mild as they get this time of year. Most people, including those with sensitivities, should have little to notice outdoors today. Looking ahead, grass pollen is expected to tick up slightly over the next several days, moving from very low toward a more moderate level by the end of the stretch. This lines up with the season, since early summer is typically when grasses become the main source of pollen, while trees such as oak, willow, and honeylocust have largely finished their spring release. If you tend to react to grass, it may be worth keeping an eye on conditions as the week progresses.
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