Westfield, Indiana Pollen Forecast - Today, Tomorrow and the Week Ahead
Pollen Today
Today (11 October) pollen in Westfield, Indiana is moderate; mold (alternaria) and mold (cladosporium) are moderate; grass, mugwort, and ragweed are low.
Pollen Tomorrow
Tomorrow (12 October 2026) grass remains low, ragweed remains low, mold (cladosporium) remains moderate, mold (alternaria) 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) | Low | 9/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Low | 2/100 |
| Ragweed (Ambrosia) | Low | 16/100 |
| Mold (Alternaria) | Moderate | 32/100 |
| Mold (Cladosporium) | Moderate | 40/100 |
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 | 3/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | None | 0/100 | |
| Ragweed (Ambrosia) | Low | 10/100 | |
| Mold (Alternaria) | Low | 22/100 | |
| Mold (Cladosporium) | Moderate | 26/100 |
Local Environmental Conditions
The area around the center of Westfield, Indiana is a mix of open grassland and built-up land. Lawns and planted trees in a nearby park add to local grass and tree pollen. Common allergenic trees nearby include maple. Beyond the trees, grasses matter a great deal, and ragweed is the main weed source.
Maple leads the season in mid-spring, as temperatures climb to around 10°C, and tree pollen reaches its peak. Grass pollen follows, peaking in late spring and easing off by early fall. Later, ragweed keeps weed pollen in the air from late summer into mid-fall. By late fall, as temperatures fall to around 5°C, pollen levels are low again.
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Frequently Asked Questions About Pollen in Indiana
Is pollen high in Westfield, Indiana right now?
On 11 October 2026, overall pollen levels in Westfield, Indiana are low. Grass is the main contributor to airborne pollen, while ambrosia and artemisia remain at lower levels
Will pollen levels change in Westfield, Indiana tomorrow?
On 12 October 2026, pollen conditions in Westfield, Indiana will be different from today, with grass at low levels, ambrosia at low levels
Is pollen expected to decrease in Westfield, Indiana this week?
According to the five-day outlook, grass, ambrosia, and artemisia pollen levels will increase later in the week.
Which pollen types are currently active in Westfield, Indiana?
On 11 October 2026, Grass is the dominant pollen source in Westfield, Indiana. ambrosia and artemisia are also present but at lower levels.
When is pollen season in Westfield, Indiana?
How often is the Westfield, Indiana pollen forecast updated?
The Westfield, Indiana pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Westfield, Indiana 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 Westfield, Indiana 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 Westfield, Indiana, 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. |
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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).
