Riverdale Pollen Forecast - Today, Tomorrow and the Week Ahead
Pollen Today
Today (11 October) pollen in Riverdale is moderate; grass, ragweed, and mold (cladosporium) are moderate; mugwort and mold (alternaria) are low.
Pollen Tomorrow
Tomorrow (12 October 2026) mold (alternaria) remains low, grass declining, ragweed declining, mold (cladosporium) declining, mugwort no longer expected.
7-Day Trend
Over the next week grass, mugwort, and ragweed will increase; mold (alternaria) and mold (cladosporium) will decrease.
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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) | Moderate | 35/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Low | 24/100 |
| Ragweed (Ambrosia) | Moderate | 36/100 |
| Mold (Alternaria) | Low | 15/100 |
| Mold (Cladosporium) | Moderate | 28/100 |
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) | Low | 1/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | None | 0/100 | |
| Ragweed (Ambrosia) | Low | 2/100 | |
| Mold (Alternaria) | Low | 10/100 | |
| Mold (Cladosporium) | Low | 18/100 |
Local Environmental Conditions
The center of Riverdale is surrounded mainly by built-up land, with a good deal of woodland. With the Chicago River nearby, riverside trees such as willow along its banks contribute to the local mix. Of the trees nearby, maple and willow are the ones that matter most for allergies. There is plenty of grass pollen here too.
Tree pollen peaks in mid-spring, when the weather warms to around 10°C and maple and willow are in full flower. Grasses take over in early summer, with temperatures around 20°C, and their pollen lingers into early fall. A smaller weed peak follows from early summer into early 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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Pollen forecast neighborhoods 1 neighborhood
Sports venues in Riverdale 1 sports venue
Frequently Asked Questions About Pollen in Illinois
Is pollen high in Riverdale right now?
On 11 October 2026, overall pollen levels in Riverdale are moderate. Ambrosia is the main contributor to airborne pollen, while grass and artemisia remain at lower levels
Will pollen levels change in Riverdale tomorrow?
On 12 October 2026, pollen conditions in Riverdale will be different from today, with ambrosia, grass continuing to decline
Is pollen expected to decrease in Riverdale this week?
According to the five-day outlook, ambrosia, artemisia, and grass pollen levels will increase later in the week.
Which pollen types are currently active in Riverdale?
On 11 October 2026, Ambrosia is the dominant pollen source in Riverdale. grass and artemisia are also present but at lower levels.
When is pollen season in Riverdale?
How often is the Riverdale pollen forecast updated?
The Riverdale pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Riverdale 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 Riverdale 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 Riverdale, 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).
