Washington pollen forecast — United States Capitol neighborhood

Today (16 July) pollen in United States Capitol, Washington is low; grass and ragweed are low. Tomorrow (17 July 2026) levels are similar. Over the following five days grass and ragweed will increase. Forecasts are calculated by Airmine using satellites to map local vegetation and determine pollen season onset.

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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team

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United States Capitol is the Capitol grounds, a landscaped hilltop park designed by Frederick Law Olmsted at the Mall's eastern end. Vegetation here reflects the wider Washington area, with tree and grass pollen exposure following the same regional pattern as the rest of the city. As with most sublevel sites, local landscaping can shift counts slightly from the citywide average.

Today - 16 July

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    None

    0/100

  • Grass (Poaceae):

    Low

    17/100

  • Oak (Quercus):

    None

    0/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    None

    0/100

  • Ragweed (Ambrosia):

    Low

    3/100

High pollen levels may trigger sneezing, itchy eyes, and congestion. Airmine's neighbourhood estimates use satellites to map local vegetation and a statistical prediction model, updated four times daily.

Tomorrow - 17 July

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    None

    0/100

  • Grass (Poaceae):

    None

    0/100

  • Oak (Quercus):

    None

    0/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    None

    0/100

  • Ragweed (Ambrosia):

    None

    0/100

Other Landmarks in Washington

Adams Morgan Anacostia Riverwalk Capitol Hill Dupont Circle Georgetown Jefferson Memorial Lincoln Memorial Logan Circle Meridian Hill Park National Mall National Zoo Navy Yard & Wharf Rock Creek Park Shaw Smithsonian National Air and Space Museum U Street Corridor United States Capitol Washington Monument White House

Sports venues in Washington

Gonzaga College HS's Baseball Diamond

Frequently Asked Questions

Is pollen high in Washington right now?

On 16 July 2026, overall pollen levels in Washington are low. Grass is the main contributor to airborne pollen, while ambrosia remain at lower levels

Will pollen levels change in Washington tomorrow?

On 17 July 2026, pollen conditions in Washington will be similar to today with no significant pollen expected.

Is pollen expected to decrease in Washington this week?

According to the five-day outlook, grass and ambrosia pollen levels will increase later in the week.

Which pollen types are currently active in Washington?

On 16 July 2026, Grass is the dominant pollen source in Washington. ambrosia are also present but at lower levels. birch, cypress, oak, willow, alder, and artemisia are not currently active.

When is pollen season in Washington?
At United States Capitol, a landmark in Washington, the pollen season opens with cedar and elm from late February with oak following close behind through April. Grass follows, peaking through May and June, while ragweed and mugwort extend the weed season into September. The mild mid-Atlantic climate advances the season compared to more northern East Coast cities, a pattern felt across this part of Washington.
How often is the Washington pollen forecast updated?

The Washington pollen forecast is updated four times daily. See the timestamp below for the most recent update.

Does pollen in Washington come from nearby or far away?

Studies show that most pollen exposure (often 70–90%) comes from nearby sources, such as local trees and vegetation. A good pollen forecast therefore depends on accurately representing local vegetation. Pollen can travel long distances, but this usually matters only early in the season or during specific wind events.

Are pollen levels in Washington based on measurements or forecasts?

Pollen data is often misunderstood. Most "pollen levels" are not real-time measurements, but forecasts.

Direct pollen measurements are typically delayed by 1-2 days because they require manual analysis. To show current conditions in Washington, modern forecasts combine recent measurements, weather data, and information about local vegetation.

This allows us to estimate pollen levels for today and the coming days, not just report the past.

Airmine’s atmospheric monitoring platform was developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team, using satellite and Earth observation technologies to improve emissions monitoring.

Want to see pollen forecasts for other cities in United States?

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Check pollen in other popular cities:

Rio de Janeiro Copenhagen Athens Denpasar Rome Cape Town Barcelona London Los Angeles New York

Data provided by Airmine — Last update: 16 July 2026 at 10:33 CEST (Data is updated four times daily.)

This page provides the latest public pollen forecast for United States Capitol, Washington.

For long term forecasts and maps, see the Airmine app

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