Low Pollen in Santa Rosa, CA

Low today, mostly weed pollen.

Last updated September 29, 2026

Today's index2out of 5Low
TreeVery Low
GrassVery Lowoff-season
WeedLowoff-season

Driving it today

OakQuercusCeltisCeltisSequoiaSequoiaSalixSalixPinePinus

Forecast

Wed
2
Thu
2
Fri
2
Sat
2

About pollen in Santa Rosa

Weed pollen is the most active category in Santa Rosa today, though overall levels remain low across the board. Tree and grass pollen are both very light and unlikely to cause much trouble, while weed pollen is running slightly higher and may be noticeable to those who are especially sensitive. Looking ahead, this pattern should hold steady over the next several days, with weed pollen staying at a low level and grass and tree pollen continuing to sit at the low end as well. This lines up with the season: tree pollen typically peaks back in spring, grass pollen tends to run its course by early summer, and weeds like ragweed are the ones still active into early fall. Local trees such as oak, sequoia, and pine are largely dormant for pollen purposes this time of year, so weeds remain the main thing to keep an eye on for now.

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

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

  • OakQuercus85%
  • HackberryCeltis11%
  • Sequoia3%
  • WillowSalix1%
  • PinePinus0%

Meet the trees near you

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

Oak

Oak

Quercus

Allergenicity 4/4Blooms spring
Maple

Maple

Acer

Allergenicity 3/4Blooms spring
Sycamore

Sycamore

Platanus acerifolia

Allergenicity 4/4Blooms spring
Pear

Pear

Pyrus

Allergenicity 1/4Blooms spring
Pine

Pine

Pinus

Allergenicity 1/4Blooms spring
Plum

Plum

Prunus

Allergenicity 1/4Blooms spring
Hackberry

Hackberry

Celtis occidentalis

Allergenicity 3/4Blooms spring
Willow

Willow

Salix

Allergenicity 3/4Blooms spring
Walnut

Walnut

Juglans

Allergenicity 3/4Blooms spring
Alder

Alder

Alnus

Allergenicity 4/4Blooms winter,spring
Raywood ash

Raywood ash

Fraxinus oxycarpa

Allergenicity 4/4Blooms spring
Poplar

Poplar

Populus

Allergenicity 3/4Blooms spring
Sweetgum

Sweetgum

Liquidambar styraciflua

Allergenicity 2/4Blooms spring
Tree

Tree

 

Allergenicity 2/4Blooms spring
Pistache

Pistache

 

Allergenicity 2/4Blooms spring
Redwood

Redwood

Sequoia sempervirens

Allergenicity 2/4Blooms spring

Common questions

What is the pollen count in Santa Rosa, CA today?
Santa Rosa, 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 Santa Rosa, 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 Santa Rosa, CA?
The main sources right now are Oak, Celtis, Sequoia, Salix, and Pine.