Westminster pollen forecast - today, tomorrow and the week ahead

Today (16 July) pollen in Westminster is low; cypress, grass, and ragweed are low. Tomorrow (17 July 2026) levels are similar - grass remains low, ragweed remains low. Over the following five days cypress, 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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Westminster's Orange County setting in the Little Saigon commercial district features olive, eucalyptus, and introduced ornamental palm as the main tree pollen sources, with the flat coastal plain and dense residential development shaping local exposure. Mild coastal temperatures allow an extended pollen season, while grass and weed pollen persist through much of the year in this Los Angeles basin suburb.

Today - 16 July

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    Low

    14/100

  • Grass (Poaceae):

    Low

    17/100

  • Oak (Quercus):

    None

    0/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    None

    0/100

  • Ragweed (Ambrosia):

    Low

    17/100

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):

    Low

    2/100

  • Oak (Quercus):

    None

    0/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    None

    0/100

  • Ragweed (Ambrosia):

    Low

    2/100

Air quality in Westminster

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Frequently Asked Questions

Is pollen high in Westminster right now?

On 16 July 2026, overall pollen levels in Westminster are low. Cypress is the main contributor to airborne pollen, while grass and ambrosia remain at lower levels

Will pollen levels change in Westminster tomorrow?

On 17 July 2026, pollen conditions in Westminster will be different from today, with grass at low levels, ambrosia at low levels

Is pollen expected to decrease in Westminster this week?

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

Which pollen types are currently active in Westminster?

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

When is pollen season in Westminster?
Westminster's pollen season in Maryland opens with cedar and maple from late January, followed by oak and pine through March and April. Grass pollen peaks through May and June, with ragweed extending the season into October. The rolling Carroll County farmland and surrounding woodland contribute substantial grass and tree pollen, while the temperate Mid-Atlantic climate produces well-defined and intense seasonal peaks throughout the extended season.
How often is the Westminster pollen forecast updated?

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

Does pollen in Westminster 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 Westminster 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 Westminster, 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: 16 July 2026 at 05:36 CEST (Data is updated four times daily.)

This page provides the latest public pollen forecast for Westminster.

For long term forecasts and maps, see the Airmine app

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