Port Barrington Pollen Forecast - Today, Tomorrow and the Week Ahead
Pollen Today
Today (10 October) pollen in Port Barrington is low; grass, mugwort, ragweed, mold (alternaria), and mold (cladosporium) are low.
Pollen Tomorrow
Tomorrow (11 October 2026) ragweed remains low, mold (alternaria) remains low, mold (cladosporium) remains low, grass no longer expected, mugwort no longer expected.
7-Day Trend
Over the next week grass and mugwort will increase; mold (alternaria) and mold (cladosporium) will decrease; ragweed will remain stable.
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Pollen Risk
Today - 10 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 | 6/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Low | 6/100 |
| Ragweed (Ambrosia) | Low | 9/100 |
| Mold (Alternaria) | Low | 13/100 |
| Mold (Cladosporium) | Low | 25/100 |
Tomorrow - 11 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) | Low | 8/100 | |
| Mold (Alternaria) | Low | 11/100 | |
| Mold (Cladosporium) | Low | 18/100 |
Local Environmental Conditions
The heart of Port Barrington is surrounded mainly by woodland, with a good deal of open grassland. Close to a stream or river, riverside vegetation contributes to what is in the air. Maple stands out as the main allergenic tree nearby. Grasses and weeds such as ragweed round out the local mix.
Tree pollen peaks in mid-spring, when the weather warms to around 10°C and maple is in full flower. Grasses take over in early summer, with temperatures around 20°C, and their pollen lingers into early fall. The season closes with ragweed from late summer into mid-fall. Rain is heaviest in summer, often giving short breaks from high pollen levels. By late fall, pollen levels are low again.
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Frequently Asked Questions About Pollen in Illinois
Is pollen high in Port Barrington right now?
On 10 October 2026, overall pollen levels in Port Barrington are low. Ambrosia is the main contributor to airborne pollen, while artemisia and grass remain at lower levels
Will pollen levels change in Port Barrington tomorrow?
On 11 October 2026, pollen conditions in Port Barrington will be different from today, with ambrosia at low levels
Is pollen expected to decrease in Port Barrington this week?
According to the five-day outlook, artemisia and grass pollen levels will increase later in the week.
Which pollen types are currently active in Port Barrington?
On 10 October 2026, Ambrosia is the dominant pollen source in Port Barrington. artemisia and grass are also present but at lower levels.
When is pollen season in Port Barrington?
How often is the Port Barrington pollen forecast updated?
The Port Barrington pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Port Barrington 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 Port Barrington 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 Port Barrington, 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).
