
Ornamental pear
Pyrus calleryana
Low today, mostly weed pollen.
Last updated August 15, 2026
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.
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.
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.
Get to know the tree types growing around Fontana: what each looks like, how allergenic it is, and when it blooms.

Ornamental pear
Pyrus calleryana

Canary island pine
Pinus canariensis

London plane
Platanus acerifolia

Maidenhair tree
Ginkgo biloba

Carolina poplar
Populus canadensis

Sycamore
Platanus acerifolia

Liquidambar
Liquidambar styraciflua

Pine
Pinus canariensis

Evergreen pear
Pyrus kawakamii

California sycamore
Platanus racemosa

Italian cypress
Cupressus sempervirens

Aleppo pine
Pinus halepensis

Tulip
Liriodendron tulipifera

Sawtooth zelkova
Zelkova serrata

Gingko
Ginkgo biloba

Leaf plum purple
Prunus cerasifera