Moderate Pollen in Centennial, CO

About pollen in Centennial

Weed pollen is the main story in Centennial today, sitting at a moderate level that will likely be noticeable for those who tend to react to ragweed and similar late-season plants. Tree pollen is quiet right now, so anyone sensitive mainly to trees like ash, linden, pyrus, spruce, or pine should get a break for the time being. Looking ahead, weed pollen is expected to hold at a similar moderate level over the next several days before easing slightly toward the end of that stretch. This fits the seasonal pattern for late September, when ragweed and other fall weeds are typically the dominant allergy trigger, while tree pollen remains inactive until it returns with the spring flowering of species such as ash and pine.

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 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 moderate 3 out of 5 on the Universal Pollen Index today, driven mainly by weed pollen. Over the next five days it ranges from 2 to 3 of 5.

Is weed pollen high in Centennial, CO right now?

Weed pollen is moderate today at 3 of 5, and it's past its peak season. Sensitive people may notice symptoms.

What plants are causing allergies in Centennial, CO?

The main sources right now are Ash, Linden, Pyrus, Picea, and Pine.