Winchester pollen forecast - today, tomorrow and the week ahead

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

Winchester's parks in Virginia and the Opequon Creek corridor feature oak, ash, and cedar as the main tree pollen sources, with exposure varying between these green areas and the more built-up city centre. Surrounding Shenandoah Valley farmland and the Blue Ridge and Appalachian Mountain ridges contribute substantial grass and tree pollen, while the valley setting channels airflows and concentrates pollen.

Today - 25 June

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    Low

    14/100

  • Grass (Poaceae):

    Medium

    50/100

  • 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):

    None

    0/100

  • Grass (Poaceae):

    Medium

    32/100

  • Willow (Salicaceae):

    None

    0/100

Frequently Asked Questions

Is pollen high in Winchester right now?

On 25 June 2026, overall pollen levels in Winchester are moderate. Grass is the main contributor to airborne pollen, while cypress remain at lower levels

Will pollen levels change in Winchester tomorrow?

On 26 June 2026, pollen conditions in Winchester will be different from today, with grass at medium levels

Is pollen expected to decrease in Winchester this week?

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

Which pollen types are currently active in Winchester?

On 25 June 2026, Grass is the dominant pollen source in Winchester. cypress are also present but at lower levels. willow and hazel are not currently active.

When is pollen season in Winchester?
Winchester's pollen season in Virginia opens with cedar and maple from late January, followed by oak and ash through March and April. Grass pollen peaks through May and June, with ragweed extending the season into October. The Shenandoah Valley and surrounding Blue Ridge and Appalachian Mountain ridges channel airflows and concentrate pollen, while surrounding Virginia farmland contributes substantial grass and tree pollen throughout the extended season.
How often is the Winchester pollen forecast updated?

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

Does pollen in Winchester 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 Winchester 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 Winchester, 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: 25 Jun 2026, 09:02 CET (Data is updated four times daily.)

This page provides the latest public pollen forecast for Winchester.

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.