Low Pollen in Fontana, CA

Low today, mostly weed pollen.

Last updated August 15, 2026

Today's index2out of 5Low
TreeNone
WeedLowoff-season

Driving it today

PyrusPyrusEucalyptusEucalyptusPlanePlatanusPinePinusLagerstroemiaLagerstroemia

Forecast

Sun
2
Mon
2
Tue
2
Wed
2

About pollen in Fontana

Weed pollen is the only real activity in Fontana today, and it remains at a low level, meaning most people won't notice much in the way of symptoms. Tree pollen is absent right now, so there's nothing stirring on that front this time of year. Overall, conditions are mild and should be easy to manage for the vast majority of allergy sufferers. Looking ahead, weed pollen is expected to hold steady at this same low level through the next several days, so no significant changes are on the horizon. This fits the season well: with local trees like Pyrus, Eucalyptus, Plane, Pine, and Lagerstroemia well past their spring pollen release, late summer tends to favor weeds as the main source of outdoor pollen. If you're sensitive to weed pollen specifically, it's worth keeping an eye on, but the coming days should stay calm overall.

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 Fontana, 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 Fontana. Each bar is that genus's share of the tree pollen.

284 pollen-relevant trees nearby drive today's tree-pollen reading.

Meet the trees near you

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

Ornamental pear

Ornamental pear

Pyrus calleryana

Allergenicity 1/4Blooms spring
Canary island pine

Canary island pine

Pinus canariensis

Allergenicity 1/4Blooms spring
London plane

London plane

Platanus acerifolia

Allergenicity 4/4Blooms spring
Maidenhair tree

Maidenhair tree

Ginkgo biloba

Allergenicity 1/4Blooms spring
Carolina poplar

Carolina poplar

Populus canadensis

Allergenicity 3/4Blooms spring
Sycamore

Sycamore

Platanus acerifolia

Allergenicity 4/4Blooms spring
Liquidambar

Liquidambar

Liquidambar styraciflua

Allergenicity 2/4Blooms spring
Pine

Pine

Pinus canariensis

Allergenicity 1/4Blooms spring
Evergreen pear

Evergreen pear

Pyrus kawakamii

Allergenicity 1/4Blooms spring
California sycamore

California sycamore

Platanus racemosa

Allergenicity 4/4Blooms spring
Italian cypress

Italian cypress

Cupressus sempervirens

Allergenicity 4/4Blooms winter,spring
Aleppo pine

Aleppo pine

Pinus halepensis

Allergenicity 1/4Blooms spring
Tulip

Tulip

Liriodendron tulipifera

Allergenicity 1/4Blooms spring
Sawtooth zelkova

Sawtooth zelkova

Zelkova serrata

Allergenicity 2/4Blooms spring
Gingko

Gingko

Ginkgo biloba

Allergenicity 1/4Blooms spring
Leaf plum purple

Leaf plum purple

Prunus cerasifera

Allergenicity 1/4Blooms spring

Common questions

What is the pollen count in Fontana, CA today?
Fontana, CA is at a low 2 out of 5 on the Universal Pollen Index today, driven mainly by weed pollen. The five-day outlook holds steady around 2 of 5.
Is weed pollen high in Fontana, CA right now?
Weed 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 Fontana, CA?
The main sources right now are Pyrus, Eucalyptus, Plane, Pine, and Lagerstroemia.