Moderate Pollen in Pasadena, TX

Moderate today, mostly grass pollen.

Last updated September 30, 2026

Today's index3out of 5Moderate
TreeLowin season
GrassModeratein season
WeedLowin season

Driving it today

LiquidambarLiquidambarCeltisCeltisOakQuercusElmUlmusSalixSalixElmGrassesRagweed

Forecast

Thu
2
Fri
1
Sat
2
Sun
2

About pollen in Pasadena

Grass pollen is the main driver of today's conditions in Pasadena, sitting at a moderate level that may be noticeable if you tend to be sensitive to it. Tree and weed pollen are both low and should be easy to manage for most people. Overall, this adds up to a moderate day, with grass being the one to watch if you typically react to it. Looking ahead, grass pollen is expected to ease slightly over the next couple of days before ticking back up toward the end of the five-day stretch, while tree and weed pollen should remain low throughout. This lines up with the seasonal pattern for late September, when tree pollen from species like Liquidambar, Celtis, oak, elm, and willow is largely dormant, and attention shifts more toward lingering grasses and the tail end of the weed and ragweed season. No dramatic changes are expected in the near term, so conditions should stay in a similar, manageable range through the week.

What to do today

  • It's important to shower and wash your hair after spending a lot of time outdoors.
  • When spending time outside, use sunglasses and a cap to keep pollen out of your face and eyes.
  • Wash clothes worn outdoors to remove any remnants of pollen grains.
  • If possible, wear glasses instead of contact lenses.
  • Did you hang any laundry outside? Now is a good time to hang clothes indoors or use a dryer if possible.

Tree map

Every dot is a tree near Pasadena, 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 Pasadena. Each bar is that genus's share of the tree pollen.

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

Meet the trees near you

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

Live oak

Live oak

Quercus virginiana

Allergenicity 4/4Blooms spring
Common hackberry

Common hackberry

Celtis occidentalis

Allergenicity 3/4Blooms spring
Pecan

Pecan

Carya illinoinensis

Allergenicity 3/4Blooms spring
Arizona ash

Arizona ash

Fraxinus velutina

Allergenicity 4/4Blooms spring
Water oak

Water oak

Quercus nigra

Allergenicity 4/4Blooms spring
Willow oak

Willow oak

Quercus phellos

Allergenicity 4/4Blooms spring
Loblolly pine

Loblolly pine

Pinus taeda

Allergenicity 1/4Blooms spring
Bradford pear

Bradford pear

Pyrus calleryana

Allergenicity 1/4Blooms spring
American elm

American elm

Ulmus americana

Allergenicity 3/4Blooms spring
Chinese elm

Chinese elm

Ulmus parvifolia

Allergenicity 3/4Blooms spring
Cedar elm

Cedar elm

Ulmus crassifolia

Allergenicity 3/4Blooms spring
Juniper

Juniper

Juniperus chinensis

Allergenicity 5/4Blooms winter,spring
American sycamore

American sycamore

Platanus occidentalis

Allergenicity 4/4Blooms spring
Mulberry

Mulberry

Morus

Allergenicity 5/4Blooms spring
Catalpa

Catalpa

Catalpa

Allergenicity 2/4Blooms spring
Nuttall oak

Nuttall oak

Quercus nuttallii

Allergenicity 4/4Blooms spring

Common questions

What is the pollen count in Pasadena, TX today?
Pasadena, TX is at a moderate 3 out of 5 on the Universal Pollen Index today, driven mainly by grass pollen. Over the next five days it ranges from 1 to 3 of 5.
Is grass pollen high in Pasadena, TX right now?
Grass pollen is moderate today at 3 of 5, and it's in season now. Sensitive people may notice symptoms.
What plants are causing allergies in Pasadena, TX?
The main sources right now are Liquidambar, Celtis, Oak, Elm, and Salix. Elm (Ulmaceae (the Elm family), Two distinct seasons, late winter to early spring, and late summer to fall (species dependent)) is actively pollinating.