
Sweetgum
Liquidambar styraciflua
Low today, mostly grass pollen.
Last updated July 1, 2026
Grass pollen is the main player in San Leandro today, sitting at a Low level (2) and edging out tree pollen, which has dropped to Very Low (1). The overall index reads Low (2) as well, so conditions are fairly mild across the board. The forecast holds steady, with grass expected to remain at Low through the next five days. This tracks with the season, as grass pollen typically dominates through late spring and early summer while spring's tree contributors—Maple, Plane, Pine, Podocarpus, and Photinia—wind down. No weed pollen data is available at this time.
Every dot is a tree near San Leandro, 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 San Leandro. Each bar is that genus's share of the tree pollen.
295 pollen-relevant trees nearby drive today's tree-pollen reading.
Get to know the tree types growing around San Leandro: what each looks like, how allergenic it is, and when it blooms.

Sweetgum
Liquidambar styraciflua

Cherry
Prunus L.

Pear
Pyrus calleryana

Plane
Platanus acerifolia

Ash
Fraxinus

Pear
Pyrus kawakamii

Oak
Quercus

Maple
Acer L.

Cypress
Cupressus

Hackberry
Celtis L.

Ginkgo
Ginkgo biloba

Cherry
Prunus serrulata

Maple
Acer palmatum

Elm
Ulmus parvifolia

Locust
Robinia

Ligustrum
Ligustrum