Westchester pollen forecast - today, tomorrow and the week ahead

Today (25 June) pollen in Westchester is low; grass is low. Tomorrow (26 June 2026) levels are similar - grass remains low, cypress at low levels. Over the following five days cypress and grass will decrease. 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

Westchester's Los Angeles County California coastal setting features coast live oak, Torrey pine, and eucalyptus as the main tree pollen sources, with exposure varying between the limited greener residential areas and the more built-up commercial corridors and the LAX airport perimeter. The LAX airport's large open grassland areas contribute additional local grass pollen, while the Pacific Ocean proximity and the marine layer create strong onshore-inland pollen gradients across this coastal community throughout the season.

Today - 25 June

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    None

    0/100

  • Grass (Poaceae):

    Low

    1/100

  • Willow (Salicaceae):

    None

    0/100

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 - 26 June

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    Low

    3/100

  • Grass (Poaceae):

    Low

    4/100

  • Willow (Salicaceae):

    None

    0/100

Frequently Asked Questions

Is pollen high in Westchester right now?

On 25 June 2026, overall pollen levels in Westchester are low. Grass is the main contributor to airborne pollen

Will pollen levels change in Westchester tomorrow?

On 26 June 2026, pollen conditions in Westchester will be different from today, with cypress at low levels, grass at low levels

Is pollen expected to decrease in Westchester this week?

According to the five-day outlook, cypress and grass pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.

Which pollen types are currently active in Westchester?

On 25 June 2026, Grass is the dominant pollen source in Westchester. hazel, cypress, and willow are not currently active.

When is pollen season in Westchester?
Westchester's Los Angeles suburban setting in Los Angeles County produces a season opening in January with olive and coastal sage before grass from surrounding Los Angeles County land peaks through March and April. Mugwort extends exposure into September, while the proximity to Los Angeles International Airport means a distinctive urban edge environment and the Pacific marine layer can periodically suppress pollen dispersal throughout the season.
How often is the Westchester pollen forecast updated?

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

Does pollen in Westchester 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 Westchester 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 Westchester, 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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Check pollen in other popular cities:

Sydney Rio de Janeiro Copenhagen Paris Athens Denpasar Rome Cape Town Barcelona London Los Angeles New York

Data provided by Airmine — Last update: 25 Jun 2026, 09:00 CET (Data is updated four times daily.)

This page provides the latest public pollen forecast for Westchester.

For long term forecasts and maps, see the Airmine app

Download on the App Store Get it on Google Play

Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team

Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.