Severn pollen forecast - today, tomorrow and the week ahead

Today (9 August) pollen in Severn is medium; ragweed is medium; grass and mugwort 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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Severn's Anne Arundel County Maryland suburban setting features oak, tulip poplar, and sweetgum as the main tree pollen sources, with exposure varying between the wooded residential neighborhoods along the Severn Run and Marley Creek corridors and the more built-up commercial areas along Annapolis Road. The Severn Run Natural Environment Area provides particularly significant local woodland pollen, while the rolling Anne Arundel topography creates modest pollen gradients throughout the season.

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

    5/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    Low

    16/100

  • Ragweed (Ambrosia):

    Medium

    40/100

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

    7/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    Low

    18/100

  • Ragweed (Ambrosia):

    Medium

    44/100

Air quality in Severn

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Frequently Asked Questions

Is pollen high in Severn right now?

On 9 August 2026, overall pollen levels in Severn are moderate. Ambrosia is the main contributor to airborne pollen, while artemisia and grass remain at lower levels

Will pollen levels change in Severn tomorrow?

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

Is pollen expected to decrease in Severn this week?

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

Which pollen types are currently active in Severn?

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

When is pollen season in Severn?
Severn's Baltimore suburban setting in Maryland 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 Severn River corridor channels airflows, while the Chesapeake Bay proximity moderates temperatures and the warm mid-Atlantic climate advances the season throughout.
How often is the Severn pollen forecast updated?

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

Does pollen in Severn 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 Severn 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 Severn, 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.

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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 Severn.

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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.