Rockville pollen forecast - today, tomorrow and the week ahead

Today (9 August) pollen in Rockville 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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Rockville's Montgomery County Maryland setting features oak, tulip poplar, and maple as the main tree pollen sources, with exposure varying between the wooded Rock Creek Park corridor and the more built-up commercial corridors along Veirs Mill Road. Rock Creek Park is a particularly significant local tree pollen source, creating distinct pollen gradients between the forested stream valley and the adjacent commercial and high-density residential areas 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

    12/100

  • 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

    5/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    Low

    12/100

  • Ragweed (Ambrosia):

    Medium

    42/100

Air quality in Rockville

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Frequently Asked Questions

Is pollen high in Rockville right now?

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

Will pollen levels change in Rockville tomorrow?

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

Is pollen expected to decrease in Rockville this week?

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

Which pollen types are currently active in Rockville?

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

When is pollen season in Rockville?
Rockville's 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 corridor channels airflows, while the warm mid-Atlantic climate and the urban heat island of the Washington DC metropolitan area advance the season slightly.
How often is the Rockville pollen forecast updated?

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

Does pollen in Rockville 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 Rockville 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 Rockville, 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 Rockville.

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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.