Baltimore pollen forecast — Fort McHenry neighborhood

Today (9 August) pollen in Fort McHenry, Baltimore is low; grass, mugwort, and ragweed are low. Tomorrow (10 August 2026) levels are similar. Over the following five days grass, mugwort, and ragweed will increase. Forecasts are calculated by Airmine using satellites to map local vegetation and determine pollen season onset.

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As a star-shaped harbor fort surrounded by open waterfront lawn, Fort McHenry draws on the same plant life found across Baltimore, keeping its pollen sources in step with the wider area. Any difference from the citywide pattern here tends to be minor rather than a distinct microclimate.

Today - 9 August

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    None

    0/100

  • Grass (Poaceae):

    Low

    2/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    Low

    1/100

  • Ragweed (Ambrosia):

    Low

    15/100

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 - 10 August

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    None

    0/100

  • Grass (Poaceae):

    Low

    4/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    Low

    3/100

  • Ragweed (Ambrosia):

    Low

    18/100

Other Landmarks in Baltimore

Canton Charles Village Druid Hill Park Federal Hill Fells Point Fort McHenry Hampden Inner Harbor Locust Point National Aquarium Remington Station North Arts District

Sports venues in Baltimore

Baltimore Country Club St. Frances Academy's Football Field

Frequently Asked Questions

Is pollen high in Baltimore right now?

On 9 August 2026, overall pollen levels in Baltimore are low. Grass is the main contributor to airborne pollen, while ambrosia and artemisia remain at lower levels

Will pollen levels change in Baltimore tomorrow?

On 10 August 2026, pollen conditions in Baltimore will be similar to today, with grass at low levels, ambrosia at low levels, artemisia at low levels

Is pollen expected to decrease in Baltimore this week?

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

Which pollen types are currently active in Baltimore?

On 9 August 2026, Grass is the dominant pollen source in Baltimore. ambrosia and artemisia are also present but at lower levels. cypress are not currently active.

When is pollen season in Baltimore?
Fort McHenry tracks Baltimore's broader pollen pattern, with cedar and elm appearing from late February before oak takes over and peaks through April. Grass pollen builds through May and June, and a late-summer weed pollen tail runs into September. The mild mid-Atlantic climate advances the season compared to more northern East Coast cities throughout the year.
How often is the Baltimore pollen forecast updated?

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

Does pollen in Baltimore 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 Baltimore 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 Baltimore, 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:

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Data provided by Airmine — Last update: 10 August 2026 at 02:34 CEST (Data is updated four times daily.)

This page provides the latest public pollen forecast for Fort McHenry, Baltimore.

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Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.

Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.