
Red maple
Acer rubrum
Moderate today, mostly grass pollen.
Last updated July 1, 2026
Grass pollen is the main driver in Warren today, sitting at a moderate level (3) and accounting for most of the overall moderate reading. Tree pollen has dropped off to very low (1), with the area's maple, elm, Celtis, oak, and Amelanchier well past their spring peak. The forecast holds grass steady at moderate for the next several days before easing slightly toward the end of the window, so expect little change in the near term. This pattern fits the season, as grasses typically dominate through late spring and early summer while tree activity winds down. Weed pollen is not reported in today's data.
Every dot is a tree near Warren, 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 Warren. Each bar is that genus's share of the tree pollen.
142 pollen-relevant trees nearby drive today's tree-pollen reading.
Get to know the tree types growing around Warren: what each looks like, how allergenic it is, and when it blooms.

Red maple
Acer rubrum

Common hackberry
Celtis occidentalis

Willow
Salix

Swamp white oak
Quercus bicolor

Elm
Ulmus

London planetree
Platanus acerifolia

Cottonwood
Populus

Kentucky coffeetree
Gymnocladus dioicus

River birch
Betula nigra

Bloodgood london planetree
Platanus acerifolia

Tulip tree
Liriodendron tulipifera

Bur oak
Quercus macrocarpa

Shingle oak
Quercus imbricaria

Japanese zelkova
Zelkova serrata

Northern red oak
Quercus rubra

Littleleaf linden
Tilia cordata