
Red maple
Acer rubrum
Low today, mostly weed pollen.
Last updated August 14, 2026
Weed pollen is the main contributor to today's overall low levels in Baltimore, though it remains fairly mild and shouldn't cause much trouble for most people. Tree pollen is barely present, a typical state for midsummer when species like oak, ginkgo, magnolia, and crape myrtle (Lagerstroemia) have long since finished releasing their pollen for the season. Looking ahead, conditions are expected to stay much the same through the next several days, with tree pollen remaining negligible and weed pollen holding at a low level, dipping slightly at times. This lull is normal for mid-August, a quiet stretch between the spring tree season and the ragweed surge that typically arrives later in the fall. For now, sensitive individuals should notice little disruption from either category.
Every dot is a tree near Baltimore, 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 Baltimore. Each bar is that genus's share of the tree pollen.
701 pollen-relevant trees nearby drive today's tree-pollen reading.
Get to know the tree types growing around Baltimore: what each looks like, how allergenic it is, and when it blooms.

Red maple
Acer rubrum

London planetree
Platanus acerifolia

Littleleaf linden
Tilia cordata

Silver maple
Acer saccharinum

Norway maple
Acer platanoides

Japanese zelkova
Zelkova serrata

White ash
Fraxinus americana

Cherry/plum
Prunus

Callery pear
Pyrus calleryana

Sugar maple
Acer saccharum

White mulberry
Morus alba

Japanese pagodatree
Styphnolobium japonicum

Northern red oak
Quercus rubra

Green ash
Fraxinus pennsylvanica

Pin oak
Quercus palustris

American elm
Ulmus americana