
Canary island pine
Pinus canariensis
Very low today, mostly grass pollen.
Last updated July 21, 2026
Pomona's air is quiet on the pollen front today. Grass pollen is present but only at a very low level, unlikely to cause much trouble even for those who are sensitive. Tree pollen is essentially absent right now, so overall this is an easy day for most allergy sufferers. Looking ahead, grass pollen is expected to hold steady at a low level over the next several days, so no significant changes are on the horizon. This tracks with the season: local trees such as maple, tristaniopsis, hickory, albizia, and Washingtonia had their peak pollen output back in spring and are largely finished for the year, while grass pollen tends to linger at low background levels through the summer before tapering off. For now, conditions remain calm and manageable.
Every dot is a tree near Pomona, 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 Pomona. Each bar is that genus's share of the tree pollen.
9 pollen-relevant trees nearby drive today's tree-pollen reading.
Get to know the tree types growing around Pomona: what each looks like, how allergenic it is, and when it blooms.

Canary island pine
Pinus canariensis

London plane bloodgood
Platanus acerifolia

Ornamental pear
Pyrus calleryana

Leaf plum purple
Prunus cerasifera

American sweetgum
Liquidambar styraciflua

White alder
Alnus rhombifolia

Glossy privet
Ligustrum lucidum

Evergreen pear
Pyrus kawakamii

Silver maple
Acer saccharinum

London plane
Platanus acerifolia

Chinese hackberry
Celtis sinensis

California sycamore
Platanus racemosa

Tulip tree
Liriodendron tulipifera

Chinese elm
Ulmus parvifolia

Shamel ash
Fraxinus uhdei

Honey locust
Gleditsia triacanthos