Low Pollen in St. Louis, MO

About pollen in St. Louis

Grass pollen is the main driver in St. Louis today, sitting at a Low level (2) and accounting for most of the overall Low reading. Tree pollen has dropped to Very Low (1), which is typical now that the spring peak for species like Maple, Ash, Elm, Celtis, and Plane has passed. The forecast keeps grass steady at Low (2) over the next several days before easing slightly to Very Low (1) at the end of the period. This fits the season, as grass tends to be the dominant source through late spring and early summer. No weed pollen data is available at this time, though ragweed generally becomes a factor later in the summer and fall.

What to do today

• It's a good day for outdoor activities since pollen levels are low.
• Do you know which plants cause your pollen allergy? Check out the pollen data to be prepared.

Tree map

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

Meet the trees near you

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

Red maple

Acer rubrum

Allergenicity 3/4Blooms spring

Green ash

Fraxinus pennsylvanica

Allergenicity 4/4Blooms spring

Callery pear

Pyrus calleryana

Allergenicity 1/4Blooms spring

Pin oak

Quercus palustris

Allergenicity 4/4Blooms spring

Littleleaf linden

Tilia cordata

Allergenicity 2/4Blooms summer

Sugar maple

Acer saccharum

Allergenicity 3/4Blooms spring

Freeman maple

Acer freemanii

Allergenicity 3/4Blooms spring

Silver maple

Acer saccharinum

Allergenicity 3/4Blooms spring

White ash

Fraxinus americana

Allergenicity 4/4Blooms spring

American sycamore

Platanus occidentalis

Allergenicity 4/4Blooms spring

Thornless honeylocust

Gleditsia triacanthos

Allergenicity 2/4Blooms spring

London planetree

Platanus acerifolia

Allergenicity 4/4Blooms spring

Cherry/plum

Prunus

Allergenicity 1/4Blooms spring

Sweetgum

Liquidambar styraciflua

Allergenicity 2/4Blooms spring

Hybrid elm

Ulmus

Allergenicity 3/4Blooms spring

Ginkgo

Ginkgo biloba

Allergenicity 1/4Blooms spring

Common questions

What is the pollen count in St. Louis, MO today?

St. Louis, MO is at a low 2 out of 5 on the Universal Pollen Index today, driven mainly by grass pollen. Over the next five days it ranges from 1 to 2 of 5.

Is grass pollen high in St. Louis, MO right now?

Grass pollen is low today at 2 of 5, and it's past its peak season. Most people won't have symptoms.

What plants are causing allergies in St. Louis, MO?

The main sources right now are Carpinus, Honeylocust, Elm, Maple, and Pine.