
Oak
Quercus
Low today, mostly grass pollen.
Last updated July 9, 2026
Grass pollen is the main story in Santa Rosa today, holding at a low level that most people will pass through without much notice, though those with sensitivities may catch a mild reaction outdoors. Tree pollen is essentially quiet right now, so it isn't contributing to the day's totals. Looking ahead, grass levels are expected to hold steady at this same low level through the next several days, so no significant change is on the horizon. This tracks with the season: local trees like willow, pear, oak, hackberry, and redwood typically finish their pollen release well before summer, leaving grasses as the dominant source through the warmer months. Overall, conditions should stay manageable for most residents in the near term.
Every dot is a tree near Santa Rosa, 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 Santa Rosa. Each bar is that genus's share of the tree pollen.
110 pollen-relevant trees nearby drive today's tree-pollen reading.
Get to know the tree types growing around Santa Rosa: what each looks like, how allergenic it is, and when it blooms.

Oak
Quercus

Maple
Acer

Sycamore
Platanus acerifolia

Pear
Pyrus

Pine
Pinus

Plum
Prunus

Hackberry
Celtis occidentalis

Willow
Salix

Walnut
Juglans

Alder
Alnus

Raywood ash
Fraxinus oxycarpa

Poplar
Populus

Sweetgum
Liquidambar styraciflua

Tree

Pistache

Redwood
Sequoia sempervirens