Hamilton pollen forecast - today, tomorrow and the week ahead

Today (25 June) pollen in Hamilton 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

Hamilton's Great Miami River Ohio setting features oak, maple, and sycamore as the main tree pollen sources, with exposure varying between the wooded hillside residential areas along the river and the more built-up Great Miami River valley commercial areas. The Great Miami River corridor is a particularly significant local source, while the river valley setting concentrates pollen under calm conditions and the surrounding Miami University Botanical Research Institute contributes distinctive local botanical pollen diversity.

Today - 25 June

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    Low

    8/100

  • Grass (Poaceae):

    Medium

    45/100

  • 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

    27/100

  • Willow (Salicaceae):

    None

    0/100

Frequently Asked Questions

Is pollen high in Hamilton right now?

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

Will pollen levels change in Hamilton tomorrow?

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

Is pollen expected to decrease in Hamilton 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 Hamilton?

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

When is pollen season in Hamilton?
Hamilton's southwest Ohio setting on the Great Miami River produces a season opening in late February with elm and maple before oak peaks through April and May. Grass from surrounding Ohio farmland peaks through June and July before mugwort and nettle extend exposure into September. The Great Miami River valley channels airflows, while the continental climate produces a well-defined seasonal progression throughout.
How often is the Hamilton pollen forecast updated?

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

Does pollen in Hamilton 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 Hamilton 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 Hamilton, 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:

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Data provided by Airmine — Last update: 25 Jun 2026, 09:01 CET (Data is updated four times daily.)

This page provides the latest public pollen forecast for Hamilton.

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.