Pollen in Denver, CO

About pollen in Denver

Denver's air is clear of tree pollen today, with readings essentially at zero. Anyone who typically struggles this time of year should find little to react to, and general outdoor activity should feel comfortable from an allergy standpoint. Looking ahead, tree pollen is expected to stay quiet over the next stretch of days, which lines up with the seasonal pattern here—local trees like crabapple, hawthorn, plane, flowering cherry, and goldenrain tree release most of their pollen in spring, so by midsummer their activity has largely wound down. If you're sensitive to allergens generally, this is a good window, though it's worth keeping an eye on grass and weed pollen as the season progresses into late summer.

What to do today

• Pollen is minimal today, so it's a great time to be outside.
• No special pollen precautions are needed right now.

Tree map

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

Meet the trees near you

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

Plains cottonwood

Populus sargentii

Allergenicity 3/4Blooms spring

Green ash

Fraxinus pennsylvanica

Allergenicity 4/4Blooms spring

Siberian elm

Ulmus pumila

Allergenicity 3/4Blooms spring

Honey locust

Gleditsia triacanthos

Allergenicity 2/4Blooms spring

Austrian pine

Pinus nigra

Allergenicity 1/4Blooms spring

Northern hackberry

Celtis occidentalis

Allergenicity 3/4Blooms spring

Boxelder

Acer negundo

Allergenicity 3/4Blooms spring

Crack willow

Salix fragilis

Allergenicity 3/4Blooms spring

White ash

Fraxinus americana

Allergenicity 4/4Blooms spring

Scotch pine

Pinus sylvestris

Allergenicity 1/4Blooms spring

Quaking aspen

Populus tremuloides

Allergenicity 3/4Blooms spring

Rocky mountain juniper

Juniperus scopulorum

Allergenicity 5/4Blooms winter,spring

Flowering pear

Pyrus calleryana

Allergenicity 1/4Blooms spring

Pinyon pine

Pinus edulis

Allergenicity 1/4Blooms spring

Silver maple

Acer saccharinum

Allergenicity 3/4Blooms spring

Peachleaf willow

Salix amygdaloides

Allergenicity 3/4Blooms spring

Common questions

What is the pollen count in Denver, CO today?

Denver, CO has no notable tree, grass, or weed pollen today.

What plants are causing allergies in Denver, CO?

The main sources right now are Malus, Crataegus, Plane, Prunus, and Koelreuteria.