
Ornamental pear
Pyrus calleryana
Moderate today, mostly weed pollen.
Last updated September 29, 2026
Weed pollen is the main story in Stockton today, sitting at a moderate level that sensitive individuals will likely notice. Grass pollen remains very low and largely a non-issue, while tree pollen is absent altogether. For most people, today's air should feel manageable, though those who react strongly to weeds may want to keep that in mind. Looking ahead, weed pollen is expected to ease slightly over the next several days but stay in a similar low-to-moderate range, so mild symptoms could linger for those affected. Grass pollen should hold steady at its current low level, offering little cause for concern. Tree pollen is not a factor right now, which fits the season, since local varieties like liquidambar, pistacia, and crape myrtle typically shed their pollen in spring rather than fall. This time of year, weeds are the more common source of irritation as summer transitions into autumn.
Every dot is a tree near Stockton, 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 Stockton. Each bar is that genus's share of the tree pollen.
5,874 pollen-relevant trees nearby drive today's tree-pollen reading.
Get to know the tree types growing around Stockton: what each looks like, how allergenic it is, and when it blooms.

Ornamental pear
Pyrus calleryana

Chinese hackberry
Celtis sinensis

London plane tree
Platanus acerifolia

Maidenhair tree
Ginkgo biloba

Red maple
Acer rubrum

Leaf plum purple
Prunus cerasifera

American sweetgum
Liquidambar styraciflua

Leaf zelkova saw
Zelkova serrata

Raywood ash
Fraxinus oxycarpa

Leaf linden little
Tilia cordata

Holly oak
Quercus ilex

White birch
Betula pendula

Italian cypress
Cupressus sempervirens

Scarlet oak
Quercus coccinea

Red oak
Quercus rubra

Evergreen pear
Pyrus kawakamii