DC pollen report
Washington Pollen Report
Washington DC's famous canopy — from the cherry trees on the Tidal Basin to the oaks lining Rock Creek Park — makes for a serious spring pollen season. The Potomac and Anacostia river corridors keep humidity high, feeding summer mold, and ragweed fills the region's lots and roadsides every fall. The metro's long warm season runs from March to November.
Collection coming soon to Washington
PollyMap is actively recruiting a verified local partner in Washington. Be the first to know — or apply to be the partner.
What drives allergies in Washington
Trees: oak, maple, and more (March – May)
Oaks (Quercus) are DC's dominant spring allergen, with maple, birch, elm, and sycamore across the metro's extensive canopy. The cherry blossoms get the attention, but the oaks cause the sneezing.
Grasses: June – July
Lawn and meadow grasses pollinate heavily in early summer across the region's parks and suburbs.
Weeds: ragweed (August – frost)
Ragweed (Ambrosia) thrives along the metro's rail corridors, construction sites, and riverbanks, with counts elevated until a hard frost.
Mold: Potomac humidity
DC's muggy summers keep Alternaria and Cladosporium active for months, with spikes after storms and during damp autumns.
Historical reports
Cities near Washington
Explore pollen activity in nearby cities reported by the PollyMap network.
Frequently asked questions
What is the pollen count in Washington DC today?
PollyMap publishes real, microscope-verified pollen counts for Washington DC — measured from physical air samples. The latest report on this page shows current tree, grass, weed, and mold levels.
Is the pollen count high in DC right now?
DC's worst stretches are April (oak), June (grasses), and September (ragweed). The measured reports on this page show today's actual levels.
When is allergy season in Washington DC?
March through November: trees in spring, grasses in early summer, ragweed from August until frost, and mold through the humid months.
Do cherry blossoms cause allergies in DC?
Barely — ornamental cherries are mostly insect-pollinated, with heavy, sticky pollen. The oak, maple, and elm pollen released during the same weeks is what drives DC's spring symptoms.
Are you an allergy clinic in Washington? Claim your territory on PollyMap.
PollyMap is a local authority-building tool for allergy clinics, ENT practices, and any clinic that offers allergy care. By becoming the Official PollyMap Partner for your part of Washington, your clinic gets credited on real pollen reports, receives ready-to-share weekly content, and becomes the go-to local expert patients trust.
We assign each partner a designated territory within the Washington metro — like a franchise territory. Washington has room for multiple partners, but once your area is assigned, it's locked to your clinic.
No clinic has claimed a territory in Washington yet. The best areas go to the first clinics that sign up — once one does, that part of town is off the table for everyone else.
The DC metro spans three jurisdictions — Northwest DC, Arlington, Alexandria, Bethesda, and Silver Spring each make PollyMap territories. First clinic in each becomes its credited pollen expert.
- Your clinic credited on every Washington pollen report
- Weekly real-sample reports and ready-to-share content under your brand
- Locked territory — competing clinics can't claim your area
- Become the go-to allergy expert in your part of Washington