Bloomington pollen forecast - today, tomorrow and the week ahead

Today (16 July) pollen in Bloomington is medium; grass is medium. Tomorrow (17 July 2026) levels are similar - grass declining. Over the following five days 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

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Bloomington's parks, including Fell Park and the Sugar Creek corridor, feature oak, maple, and ash as the main tree pollen sources, with exposure varying between these green areas and the more built-up city centre. Surrounding Illinois farmland and prairie contribute substantial grass and crop pollen, while the flat, open Midwest landscape allows pollen to disperse readily across the city under prevailing westerly winds.

Today - 16 July

  • 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

  • Oak (Quercus):

    None

    0/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    None

    0/100

  • Ragweed (Ambrosia):

    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 - 17 July

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    None

    0/100

  • Grass (Poaceae):

    Low

    21/100

  • Oak (Quercus):

    None

    0/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    None

    0/100

  • Ragweed (Ambrosia):

    None

    0/100

Air quality in Bloomington

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Frequently Asked Questions

Is pollen high in Bloomington right now?

On 16 July 2026, overall pollen levels in Bloomington are moderate. Grass is the main contributor to airborne pollen

Will pollen levels change in Bloomington tomorrow?

On 17 July 2026, pollen conditions in Bloomington will be different from today, with grass continuing to decline

Is pollen expected to decrease in Bloomington this week?

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

Which pollen types are currently active in Bloomington?

On 16 July 2026, Grass is the dominant pollen source in Bloomington. willow, alder, ambrosia, artemisia, birch, cypress, and oak are not currently active.

When is pollen season in Bloomington?
Bloomington's pollen season in Illinois opens with maple and elm from late February, followed by oak and ash through April and May. Grass pollen peaks through June and July, with ragweed extending the season strongly into October. The flat, open Illinois farmland and prairie landscape allows substantial grass and crop pollen to disperse widely under prevailing westerly winds, while the humid continental climate produces well-defined and intense seasonal peaks.
How often is the Bloomington pollen forecast updated?

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

Does pollen in Bloomington 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 Bloomington 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 Bloomington, 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: 16 July 2026 at 05:36 CEST (Data is updated four times daily.)

This page provides the latest public pollen forecast for Bloomington.

For long term forecasts and maps, see the Airmine app

Download on the App Store Get it on Google Play

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