
Green ash
Fraxinus pennsylvanica
Moderate today, mostly weed pollen.
Last updated September 30, 2026
Weed pollen is the main story in Aurora today, sitting at a moderate level that's likely to be noticeable for anyone who tends to react to ragweed and its relatives this time of year. Tree pollen is quiet, so if you're dealing with any sniffling or itchy eyes today, weeds are the more probable cause. Looking ahead, weed pollen should hold steady at a moderate level for the next several days before easing slightly toward the end of the stretch. This lines up with the seasonal pattern for early fall, when ragweed and other late-season weeds are typically the dominant source of pollen in the area. Trees like ash, oak, maple, elm, and celtis are well past their active period and aren't expected to contribute meaningfully again 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