High Pollen in Tempe, AZ

High today, mostly weed pollen.

Last updated October 14, 2026

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

Driving it today

GrassesRagweed

Forecast

Thu
5
Fri
5
Sat
5
Sun
4

About pollen in Tempe

Weed pollen is the main driver of discomfort in Tempe today, running high and likely to affect anyone with sensitivities. Grass pollen is also active at a moderate level, which can add to symptoms for those who react to multiple pollen types. Tree pollen is quiet right now, so it is not a concern at the moment. Looking ahead, this pattern should hold steady through the next several days, with grass staying moderate and weed pollen remaining high — even ticking up slightly before easing a bit toward the end of the stretch. This fits the season well, as fall in the Phoenix area is typically dominated by weeds such as ragweed, while grass continues to linger. Tree pollen from species like mesquite and olive is largely dormant this time of year and will not become a factor again until spring.

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 Tempe, AZ today?
Tempe, 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 Tempe, 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 Tempe, 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.