West Hills pollen forecast - today, tomorrow and the week ahead

Today (30 August) pollen in West Hills is moderate; ragweed is moderate; grass is low. Tomorrow (31 August 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.

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Chaminade HS's Baseball Diamond is set in the West Hills suburban landscape of the western San Fernando Valley, with introduced olive, oak, and chaparral as the main surrounding pollen sources. The Santa Monica Mountains nearby contribute substantial native chaparral vegetation pollen, while the mild Southern California climate advances the season and the Pacific marine layer can periodically suppress pollen dispersal throughout.

Today - 30 August

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    None

    0/100

  • Grass (Poaceae):

    Low

    12/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    None

    0/100

  • Ragweed (Ambrosia):

    Moderate

    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 - 31 August

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    None

    0/100

  • Grass (Poaceae):

    Low

    11/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    None

    0/100

  • Ragweed (Ambrosia):

    Moderate

    39/100

Air quality in West Hills

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Frequently Asked Questions

Is pollen high in West Hills right now?

On 30 August 2026, overall pollen levels in West Hills are moderate. Ambrosia is the main contributor to airborne pollen, while grass remain at lower levels

Will pollen levels change in West Hills tomorrow?

On 31 August 2026, pollen conditions in West Hills will be similar to today, with grass at low levels, ambrosia at moderate levels

Is pollen expected to decrease in West Hills 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 West Hills?

On 30 August 2026, Ambrosia is the dominant pollen source in West Hills. grass are also present but at lower levels. artemisia and cypress are not currently active.

When is pollen season in West Hills?
Like the rest of West Hills, Chaminade HS's Baseball Diamond experiences a season that opens with olive and acacia from January before eucalyptus peaks during February. Grass pollen then peaks through March and April, and light weed pollen carries into September. The Southern California Mediterranean climate advances the season, and onshore Pacific breezes can periodically disperse pollen.
How often is the West Hills pollen forecast updated?

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

Does pollen in West Hills 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 West Hills 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 West Hills, 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: 30 August 2026 at 08:36 CEST (Data is updated four times daily.)

This page provides the latest public pollen forecast for West Hills.

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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.

Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.