West Branch Township pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in West Branch Township is low; grass and ragweed are low.
Pollen Tomorrow
Tomorrow (21 September 2026) grass 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 - 20 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) | Low | 2/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | None | 0/100 |
| Ragweed (Ambrosia) | Low | 5/100 |
Tomorrow - 21 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) | None | 0/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | None | 0/100 | |
| Ragweed (Ambrosia) | None | 0/100 |
Local Environmental Conditions
West Branch Township has hazel and willow line the nearby bank, and their pollen carries easily on the wind. Around West Branch Township, a nearby green space's lawns and planted trees add a small share of grass and ragweed pollen. Soil and microclimate can push these levels slightly higher or lower.
Hazel and willow lead the calendar, with a peak around late winter through March. Grass pollen builds through late spring and peaks in June. Ragweed then takes over from mid-August through October.
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Resource Hub
Pollen forecast neighborhoods 1 neighborhood
Sports venues in West Branch Township 1 sports venue
Frequently Asked Questions About Pollen in Michigan
Is pollen high in West Branch Township right now?
On 20 September 2026, overall pollen levels in West Branch Township are low. Ambrosia is the main contributor to airborne pollen, while grass remain at lower levels
Will pollen levels change in West Branch Township tomorrow?
On 21 September 2026, pollen conditions in West Branch Township will be similar to today with no significant pollen expected.
Is pollen expected to decrease in West Branch Township 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 Branch Township?
On 20 September 2026, Ambrosia is the dominant pollen source in West Branch Township. grass are also present but at lower levels. artemisia are not currently active.
When is pollen season in West Branch Township?
How often is the West Branch Township pollen forecast updated?
The West Branch Township pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in West Branch Township 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 Branch Township 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 Branch Township, 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/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).
