West Allis pollen forecast — Henderson Park neighborhood
Pollen Today
Today (2 September) pollen in Henderson Park, West Allis is high; ragweed is high; grass is moderate; mugwort is low.
Pollen Tomorrow
Tomorrow (3 September 2026) grass remains moderate, ragweed remains high, mugwort no longer expected.
7-Day Trend
Over the next week grass, mugwort, and ragweed will increase; cypress will remain stable.
Forecasts are calculated by Airmine using satellites to map local vegetation and determine pollen season onset. Airmine's estimates use satellites to map local vegetation and a statistical prediction model, updated four times daily. Developed with support from the European Space Agency (ESA) Business Applications and Space Solutions (BASS) team.
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Air Quality
Air Quality Forecast for West Allis AQI today AQI tomorrowPollen for Neighborhoods
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Pollen Risk
Today - 2 September
| 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 | 34/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Low | 3/100 |
| Ragweed (Ambrosia) | High | 67/100 |
Tomorrow - 3 September
| 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) | Moderate | 26/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | None | 0/100 | |
| Ragweed (Ambrosia) | High | 58/100 |
Local Environmental Conditions
Located close to home here, this area has a stretch of hazel and willow lines the water, feeding some of spring's earliest pollen. Nearby, just outside the immediate area, this patch of forest is largely oak and birch, a pairing known for heavy spring pollen output. This park's mix of turf and landscaped trees contributes a modest grass and ragweed pollen load, within the neighborhood.
Hazel and willow along the water get the season underway before other species, leading off the pollen calendar, with a peak generally falling in late winter. Once hazel fades, oak and birch in the woods carry the season forward, reaching maximum intensity across the April-May window. Grass pollen builds through late spring and peaks in June, before ragweed takes over as the dominant allergen from mid-August through October.
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Pollen forecast neighborhoods 21 neighborhoods
Sports venues in West Allis 1 sports venue
Frequently Asked Questions About Pollen in Wisconsin
Is pollen high in West Allis right now?
On 2 September 2026, overall pollen levels in West Allis are high. Ambrosia is the main contributor to airborne pollen, while grass and artemisia remain at lower levels
Will pollen levels change in West Allis tomorrow?
On 3 September 2026, pollen conditions in West Allis will be different from today, with ambrosia at high levels, grass at moderate levels
Is pollen expected to decrease in West Allis 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 West Allis?
On 2 September 2026, Ambrosia is the dominant pollen source in West Allis. grass and artemisia are also present but at lower levels. cypress are not currently active.
When is pollen season in West Allis?
How often is the West Allis pollen forecast updated?
The West Allis pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in West Allis 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 West Allis 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 West Allis, 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 scores represent risk levels, not direct measurements of pollen or air pollutant concentrations. Higher scores indicate higher risk. Pollen and air quality use different thresholds.
Pollen
| None | 0 | No or negligible risk of exposure. Pollen exposure is expected to be minimal. |
| Low | 0-25 | Low risk of exposure. Small amounts of pollen may be present. |
| Moderate | 25-50 | Moderate risk of exposure. Pollen exposure is expected to be noticeable. |
| High | 50-75 | High risk of exposure. Elevated pollen exposure is expected. |
| Very High | 75-100 | Very high risk of exposure. Pollen 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).
