
Green ash
Fraxinus pennsylvanica
Moderate today, mostly weed pollen.
Last updated August 15, 2026
Weed pollen is the main story in Aurora today, running at a moderate level that many sensitive individuals will notice. Tree pollen is quiet, so any allergy symptoms right now are almost certainly coming from weeds rather than trees. Expect some mild irritation if you spend extended time outdoors, though it should be manageable for most people. Looking ahead, weed pollen is expected to hold steady over the next couple of days before ticking up to a more noticeable level, then easing slightly by the end of the five-day stretch. This pattern fits the season well, as mid-August marks the period when weeds, particularly ragweed, tend to become more active as summer winds down. Tree pollen from species common to the area, such as Celtis, ash, oak, maple, and elm, remains out of the picture for now, since their release windows are well behind us and won't return until spring.
Every dot is a tree near Aurora, colored by how allergenic it is. Click one for its details, and zoom in for a closer look.
The local tree genera behind today's pollen near Aurora. Each bar is that genus's share of the tree pollen.
283 pollen-relevant trees nearby drive today's tree-pollen reading.
Get to know the tree types growing around Aurora: what each looks like, how allergenic it is, and when it blooms.

Green ash
Fraxinus pennsylvanica

Silver maple
Acer saccharinum

American linden
Tilia americana

Honeylocust
Gleditsia triacanthos

Honey locust
Gleditsia triacanthos

Shademaster honeylocust
Gleditsia triacanthos

Linden
Tilia

Norway maple
Acer platanoides

Austrian pine
Pinus nigra

Plains cottonwood
Populus sargentii

Ponderosa pine
Pinus ponderosa

White ash
Fraxinus americana

Hackberry
Celtis occidentalis

Pinyon pine
Pinus edulis

Littleleaf linden
Tilia cordata

Rocky mountain juniper
Juniperus scopulorum