Dunning, Harwood Heights Pollen Forecast - Today, Tomorrow and the Week Ahead
Pollen Today
Today (11 October) pollen in Dunning, Harwood Heights is low; grass, mugwort, and ragweed are low.
Pollen Tomorrow
Tomorrow (12 October 2026) grass no longer expected, mugwort no longer expected, ragweed no longer expected.
7-Day Trend
Over the next week grass, mugwort, and ragweed will increase.
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Pollen Risk
Today - 11 October
| Pollen species | Level | Value |
|---|---|---|
| Alder (Alnus) | None | 0/100 |
| Birch (Betula) | None | 0/100 |
| Hazel (Corylus) | None | 0/100 |
| Cypress (Cupressaceae) | None | 0/100 |
| Grass (Poaceae) | Low | 8/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Low | 6/100 |
| Ragweed (Ambrosia) | Low | 10/100 |
Tomorrow - 12 October
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| 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) | None | 0/100 |
Local Environmental Conditions
This site in Harwood Heights is densely built up, with some open grassland. With a watercourse close by, riverside trees such as willow, poplar and plane tree contribute to the local mix. Common allergenic trees nearby include oak and maple. Grasses also feature strongly, alongside ragweed and plantain among the weeds.
Tree pollen peaks in late spring, when the weather warms to around 15°C and oak and maple are in full flower. Grass pollen follows, peaking in early summer and easing off by early fall. Ragweed and plantain bring a final peak from late summer into mid-fall. Summer is the wettest time of year, and heavy showers can bring short breaks in pollen.
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Resource Hub
Pollen forecast neighborhoods 8 neighborhoods
Sports venues in Harwood Heights 1 sports venue
Frequently Asked Questions About Pollen in Illinois
Is pollen high in Harwood Heights right now?
On 11 October 2026, overall pollen levels in Harwood Heights are low. Artemisia is the main contributor to airborne pollen, while grass and ambrosia remain at lower levels
Will pollen levels change in Harwood Heights tomorrow?
On 12 October 2026, pollen conditions in Harwood Heights will be similar to today with no significant pollen expected.
Is pollen expected to decrease in Harwood Heights this week?
According to the five-day outlook, artemisia, grass, and ambrosia pollen levels will increase later in the week.
Which pollen types are currently active in Harwood Heights?
On 11 October 2026, Artemisia is the dominant pollen source in Harwood Heights. grass and ambrosia are also present but at lower levels.
When is pollen season in Harwood Heights?
How often is the Harwood Heights pollen forecast updated?
The Harwood Heights pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Harwood Heights 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 Harwood Heights 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 Harwood Heights, 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.
Understanding the Scale
The 0–100 pollen scores represent risk levels, not direct pollen measurements. Higher scores indicate higher risk.
Pollen
| None | 0 | No or negligible risk of exposure. Pollen/mold exposure is expected to be minimal. |
| Low | 0-25 | Low risk of exposure. Small amounts of pollen or mold spores may be present. |
| Moderate | 25-50 | Moderate risk of exposure. Pollen/mold exposure is expected to be noticeable. |
| High | 50-75 | High risk of exposure. Elevated pollen/mold exposure is expected. |
| Very High | 75-100 | Very high risk of exposure. Pollen/mold exposure is expected to be at or near its highest levels. |
Get More in the Airmine Pollen app
Get 15-day pollen forecasts with morning, afternoon and evening detail, plus 5-day air quality forecasts. Explore interactive pollen risk maps, estimated pollen season start, route profiles and a symptoms diary.
Features and forecast availability vary by region. Currently covering Europe, the contiguous US, southern Canada, South Africa, Australia, Indonesia (Java & Bali), Brazil, Paraguay, Uruguay and the Buenos Aires area.
Developed with support from the European Space Agency (ESA) Business Applications and Space Solutions (BASS).
