High Pollen in Centennial, CO

About pollen in Centennial

Weed pollen is the main driver of today's allergy conditions in Centennial, with levels running high enough to cause noticeable symptoms for those who are sensitive. Tree pollen is quiet, so any irritation you notice is almost certainly coming from weeds rather than trees like ash, linden, pyrus, or pine, none of which are contributing right now. Looking ahead, weed pollen is expected to remain high through the next several days, with a possible uptick later in the stretch before settling back down. This tracks with the season, as late summer is prime time for weed pollen, particularly ragweed, to dominate the air while tree pollen stays dormant until next spring. If you tend to react to weeds, it may be a good stretch to keep symptom relief on hand and limit prolonged time outdoors during peak afternoon hours.

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).

Tree map

Every dot is a tree near Centennial, colored by how allergenic it is. Click one for its details, and zoom in for a closer look.

Top tree-pollen sources

The local tree genera behind today's pollen near Centennial. Each bar is that genus's share of the tree pollen.

Meet the trees near you

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

Green ash

Fraxinus pennsylvanica

Allergenicity 4/4Blooms spring

White ash

Fraxinus americana

Allergenicity 4/4Blooms spring

Austrian pine

Pinus nigra

Allergenicity 1/4Blooms spring

Littleleaf linden

Tilia cordata

Allergenicity 2/4Blooms summer

Ponderosa pine

Pinus ponderosa

Allergenicity 1/4Blooms spring

Honeylocust

Gleditsia triacanthos

Allergenicity 2/4Blooms spring

Freeman maple

Acer freemanii

Allergenicity 3/4Blooms spring

Norway maple

Acer platanoides

Allergenicity 3/4Blooms spring

American linden

Tilia americana

Allergenicity 2/4Blooms summer

Honey locust

Gleditsia triacanthos

Allergenicity 2/4Blooms spring

Linden

Tilia

Allergenicity 2/4Blooms summer

Silver maple

Acer saccharinum

Allergenicity 3/4Blooms spring

Flowering pear

Pyrus calleryana

Allergenicity 1/4Blooms spring

Scotch pine

Pinus sylvestris

Allergenicity 1/4Blooms spring

Northern red oak

Quercus rubra

Allergenicity 4/4Blooms spring

Northern hackberry

Celtis occidentalis

Allergenicity 3/4Blooms spring

Common questions

What is the pollen count in Centennial, CO today?

Centennial, CO 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 Centennial, CO right now?

Weed pollen is high today at 4 of 5, and it's past its peak season. Many allergy sufferers will have symptoms.

What plants are causing allergies in Centennial, CO?

The main sources right now are Ash, Linden, Pyrus, Picea, and Pine. Elm (Ulmaceae (the Elm family), Two distinct seasons, late winter to early spring, and late summer to fall (species dependent)) is actively pollinating.