
Ornamental pear
Pyrus calleryana
Low today, mostly grass pollen.
Last updated July 9, 2026
Grass is the main source of pollen in Fontana today, though it remains at a low level. Tree pollen is quiet for now, so most people should get through the day without much irritation. Those especially sensitive to grass may notice mild effects, but overall conditions are mild and manageable. Looking ahead, grass pollen is expected to hold steady at this same low level over the next several days, so no significant changes are anticipated in the near term. This fits the seasonal pattern, as summer tends to keep grass pollen active while tree species like Pyrus, Eucalyptus, Plane, Pine, and Lagerstroemia have largely finished their spring release. Overall, conditions should remain calm and predictable for the immediate future.
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