High Pollen in Phoenix, AZ

High today, mostly weed pollen.

Last updated September 30, 2026

Today's index4out of 5High
TreeNonein season
GrassModeratein season
WeedHighin season

Driving it today

GrassesRagweed

Forecast

Thu
4
Fri
4
Sat
4
Sun
5

About pollen in Phoenix

Weed pollen is the main driver of today's conditions in Phoenix, running high and likely to be noticeable for anyone sensitive to it. Grass pollen adds to the mix at a moderate level, which may bring mild irritation for those prone to reactions, while tree pollen is quiet and not a concern right now. Looking ahead, weed pollen is expected to climb even further over the next several days, moving into the very high range, and grass pollen will also creep upward from moderate to high. Tree pollen should stay absent throughout this stretch, which fits the season, since local trees such as mesquite, olive, and palo verde typically shed their pollen in spring rather than fall. This time of year in the desert Southwest is dominated by weeds like ragweed and other late-season bloomers, so those with sensitivities may want to keep that in mind as the days progress.

What to do today

  • Avoid mowing the lawn and raking leaves.
  • When driving the car, close your windows and turn the air conditioning system to recirculation mode.
  • Keep your windows closed and turn on your air purifier or air conditioning.
  • Consider staying indoors during the peak pollen hours (morning and early afternoon).

Common questions

What is the pollen count in Phoenix, AZ today?
Phoenix, AZ is at a high 4 out of 5 on the Universal Pollen Index today, driven mainly by weed pollen. Over the next five days it ranges from 4 to 5 of 5.
Is weed pollen high in Phoenix, AZ right now?
Weed pollen is high today at 4 of 5, and it's in season now. Many allergy sufferers will have symptoms.
What plants are causing allergies in Phoenix, AZ?
The main sources right now are Grasses and Ragweed. Elm (Ulmaceae (the Elm family), Two distinct seasons, late winter to early spring, and late summer to fall (species dependent)) is actively pollinating.