
Dr. Elena Reece
Howard University Hospital Faculty Practice Plan - Allergy & Immunology
Check today's pollen count by city in District of Columbia. Explore local allergy forecasts, monitor common seasonal allergens, and use city-level trends to plan around high pollen days.
Allergy Ava organizes statewide and local pollen information so you can compare conditions, anticipate seasonal flare-ups, and find relevant allergy forecast pages faster.
Pollen levels in District of Columbia can vary by city, weather, vegetation, and season. Choose a local forecast below to see the current allergy index, main allergen, and 5-day outlook for cities including Washington, D.C..
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Local allergy care
Use today's pollen forecast alongside nearby allergy and immunology profiles when symptoms need clinical follow-up, testing, or long-term treatment planning.

Howard University Hospital Faculty Practice Plan - Allergy & Immunology

Watergate and McLean Allergy and Asthma Centers

MedStar Health

ILERA Allergy and Asthma Center

MedStar Health

Watergate and McLean Allergy and Asthma Centers
District of Columbia allergy sufferers can use this page to monitor pollen trends and find relevant city forecasts when available. Pollen levels vary by season, with tree pollen often peaking in spring, grass pollen becoming more active in late spring and summer, and weed pollen, especially ragweed, remaining a concern in late summer and fall.
Use Allergy Ava's city-level forecasts to plan outdoor activities, manage medication timing, and stay informed about the allergens most prevalent in your area. Our data is updated regularly to give you the most accurate picture of current conditions.
Usually, no. Cherry blossoms are highly visible, but many ornamental flowering trees rely more on insects than wind. DC spring symptoms are more often driven by wind-pollinated trees such as oak, maple, elm, sycamore, birch, cedar, ash, and mulberry.
Tree canopy, park proximity, river corridors, traffic exposure, mowing, construction, and urban heat vary block by block. A Rock Creek, Capitol Hill, Brookland, Anacostia, or Foggy Bottom day can feel different even under the same citywide forecast.
Sometimes water-adjacent breezes can redirect or dilute pollen, but they are not a guarantee. River humidity can also make mold-sensitive symptoms more noticeable, especially after rain or leaf drop.
Ragweed usually becomes important in August and can last into October or until colder weather becomes consistent. Wind can carry ragweed pollen from disturbed soil, road edges, vacant lots, and regional open areas into dense neighborhoods.
Today's statewide signal
Washington, DC allergy conditions are shaped by a dense urban tree canopy, Rock Creek Park, the Potomac and Anacostia corridors, neighborhood lawns, traffic corridors, heat-island effects, humidity, and late-season ragweed. Use the Washington, DC page to check local pollen levels, the leading allergen, weather context, and short-term trend signals before commuting, running, sightseeing, or spending time outdoors.
Data updates regularly to reflect current conditions across District of Columbia cities.
Highest city index now
Washington, D.C.
Oak · High
4
Live city comparison
Sort District of Columbia cities by pollen index, temperature, or trend. Select a city for its full local forecast.
| Main allergen | Weather context | ||||
|---|---|---|---|---|---|
| Washington, D.C. | 4High | Oak | Stable Tomorrow looks similar, near high conditions. | 77°F | Partly sunny Watch oak levels and limit long outdoor exposure during peak hours. |
Regional allergy forecast
Even with one city page, DC pollen exposure can vary by neighborhood. Tree-lined streets, Rock Creek Park, the National Mall, river corridors, school fields, rowhouse blocks, and urban heat can all change the day’s main trigger.
State-specific pollen calendar
March to May
Oak, maple, elm, sycamore, birch, cedar or juniper, mulberry, ash, and other wind-pollinated trees can drive the strongest spring symptoms across DC’s streets, parks, and river corridors.
May to July
Timothy, rye, fescue, bluegrass, Bermuda grass, lawns, school fields, parks, rights-of-way, and open green space can raise late-spring and summer pollen exposure.
August to October
Ragweed is the main fall pollen trigger, with plantain, dock, pigweed, and other weeds adding pressure around rail corridors, vacant lots, road edges, construction sites, and disturbed soil.
November to February
Outdoor pollen usually drops after colder weather, but damp leaves, basement mold, indoor dust, pets, and mild winter warmups can still irritate symptoms before the next tree season starts.
Weather-pollen correlation
Wind can disperse pollen, rain can temporarily wash particles down, and humidity can increase mold irritation. The city table combines pollen and weather signals so users can compare outdoor risk without opening every city page.