Williamstown Township pollen forecast - today, tomorrow and the week ahead

Today (9 August) pollen in Williamstown Township is low; ragweed is low. Tomorrow (10 August 2026) levels are similar - ragweed increasing, grass at low levels, mugwort at medium levels. Over the following five days mugwort and ragweed will increase; grass will decrease. Forecasts are calculated by Airmine using satellites to map local vegetation and determine pollen season onset.

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Hazel and willow thrive along the damp bank, both prolific early wind-pollinators; this sits barely 150 meters away. A canopy of oak and birch, birch chief among them for allergenic potency here, just a short walk at 50 meters. Local microclimate and soil conditions can push these figures slightly higher or lower.

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):

    None

    0/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    None

    0/100

  • Ragweed (Ambrosia):

    Low

    10/100

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

    15/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    Medium

    31/100

  • Ragweed (Ambrosia):

    Medium

    42/100

Air quality in Williamstown Township

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Frequently Asked Questions

Is pollen high in Williamstown Township right now?

On 9 August 2026, overall pollen levels in Williamstown Township are low. Ambrosia is the main contributor to airborne pollen

Will pollen levels change in Williamstown Township tomorrow?

On 10 August 2026, pollen conditions in Williamstown Township will be different from today, with artemisia at medium levels, grass at low levels and ambrosia increasing

Is pollen expected to decrease in Williamstown Township this week?

According to the five-day outlook, grass pollen levels are expected to gradually decrease, while ambrosia and artemisia pollen will increase, suggesting mixed conditions later in the week.

Which pollen types are currently active in Williamstown Township?

On 9 August 2026, Ambrosia is the dominant pollen source in Williamstown Township. artemisia, cypress, and grass are not currently active.

When is pollen season in Williamstown Township?
Hazel and willow along the water get the season underway before other species, leading off the pollen calendar, with a peak generally falling in late winter. Woodland oak and birch pick up the pace next, through mid-to-late spring, typically the year's sharpest tree-pollen spell, centered on April and May. Grass pollen takes over next, building to a peak around June, before ragweed takes over as the dominant allergen from mid-August through October.
How often is the Williamstown Township pollen forecast updated?

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

Does pollen in Williamstown Township 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 Williamstown Township 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 Williamstown Township, 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: 9 August 2026 at 20:27 CEST (Data is updated four times daily.)

This page provides the latest public pollen forecast for Williamstown Township.

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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.