Aspen Hill pollen forecast - today, tomorrow and the week ahead

Today (16 July) pollen in Aspen Hill 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.

For long term forecasts and maps, see the Airmine app

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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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Aspen Hill's Montgomery County Maryland unincorporated suburban setting features oak, tulip poplar, and maple as the main tree pollen sources, with exposure varying between the wooded Northwest Branch and Rock Creek tributary corridor areas and the more built-up commercial corridors along Veirs Mill Road. The Northwest Branch corridor provides particularly significant local woodland pollen, while the rolling Montgomery County topography creates distinct creek valley-to-upland pollen gradients throughout the season.

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

    21/100

  • 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

Air quality in Aspen Hill

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Frequently Asked Questions

Is pollen high in Aspen Hill right now?

On 16 July 2026, overall pollen levels in Aspen Hill are low. Ambrosia is the main contributor to airborne pollen, while grass remain at lower levels

Will pollen levels change in Aspen Hill tomorrow?

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

Is pollen expected to decrease in Aspen Hill this week?

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

Which pollen types are currently active in Aspen Hill?

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

When is pollen season in Aspen Hill?
Aspen Hill's Montgomery County Maryland suburban setting produces a season opening in late February with cedar and elm before oak peaks through April. Grass from surrounding Maryland farmland peaks through May and June before mugwort and nettle extend exposure into September. The Rock Creek tributary setting channels airflows, while the warm mid-Atlantic climate and Washington DC urban heat island advance the season slightly throughout.
How often is the Aspen Hill pollen forecast updated?

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

Does pollen in Aspen Hill 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 Aspen Hill 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 Aspen Hill, 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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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 Aspen Hill.

For long term forecasts and maps, see the Airmine app

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