
Ornamental pear
Pyrus calleryana
Low today, mostly grass pollen.
Last updated July 1, 2026
Grass pollen is the main driver in Fontana today, sitting at a moderate level (3) and pushing the overall index to moderate as well. Tree pollen has dropped off entirely, registering none, so local species like Pyrus, Eucalyptus, Plane, Pine, and Lagerstroemia are not contributing much right now. The forecast holds grass steady at moderate for the next several days before easing slightly toward the lower end of that range. This pattern fits the season, as grass pollen tends to dominate through late spring and early summer once the spring tree peak has passed. Weed pollen is not reported in the current data.
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