Low Pollen in San Leandro, CA

Low today, mostly grass pollen.

Last updated July 1, 2026

Today's index2out of 5Low
TreeNone
GrassLowoff-season

Driving it today

PyrusPyrusLiquidambarLiquidambarMalusMalusAlbiziaAlbiziaCrataegusCrataegus

Forecast

Thu
2
Fri
2
Sat
2
Sun
2

About pollen in San Leandro

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.

What to do today

  • It's a good day for outdoor activities since pollen levels are low.
  • Do you know which plants cause your pollen allergy? Check out the pollen data to be prepared.

Tree map

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.

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Top tree-pollen sources

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.

Meet the trees near you

Get to know the tree types growing around San Leandro: what each looks like, how allergenic it is, and when it blooms.

Sweetgum

Sweetgum

Liquidambar styraciflua

Allergenicity 2/4Blooms spring
Cherry

Cherry

Prunus L.

Allergenicity 1/4Blooms spring
Pear

Pear

Pyrus calleryana

Allergenicity 1/4Blooms spring
Plane

Plane

Platanus acerifolia

Allergenicity 4/4Blooms spring
Ash

Ash

Fraxinus

Allergenicity 4/4Blooms spring
Pear

Pear

Pyrus kawakamii

Allergenicity 1/4Blooms spring
Oak

Oak

Quercus

Allergenicity 4/4Blooms spring
Maple

Maple

Acer L.

Allergenicity 3/4Blooms spring
Cypress

Cypress

Cupressus

Allergenicity 4/4Blooms winter,spring
Hackberry

Hackberry

Celtis L.

Allergenicity 3/4Blooms spring
Ginkgo

Ginkgo

Ginkgo biloba

Allergenicity 1/4Blooms spring
Cherry

Cherry

Prunus serrulata

Allergenicity 1/4Blooms spring
Maple

Maple

Acer palmatum

Allergenicity 3/4Blooms spring
Elm

Elm

Ulmus parvifolia

Allergenicity 3/4Blooms spring
Locust

Locust

Robinia

Allergenicity 2/4Blooms spring
Ligustrum

Ligustrum

Ligustrum

Allergenicity 2/4Blooms spring

Common questions

What is the pollen count in San Leandro, CA today?
San Leandro, CA is at a low 2 out of 5 on the Universal Pollen Index today, driven mainly by grass pollen. The five-day outlook holds steady around 2 of 5.
Is grass pollen high in San Leandro, CA right now?
Grass pollen is low today at 2 of 5, and it's past its peak season. Most people won't have symptoms.
What plants are causing allergies in San Leandro, CA?
The main sources right now are Pyrus, Liquidambar, Malus, Albizia, and Crataegus.