Yellowstone pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (2 September) pollen in Yellowstone is low; grass, mugwort, and ragweed are low.
Pollen Tomorrow
Tomorrow (3 September 2026) mugwort remains low, ragweed remains low, grass 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 Yellowstone AQI today AQI tomorrowPollen in Other Cities
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Local pollen and air quality forecasts, interactive pollen maps and route profiles
Features and forecast availability vary by region.
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) | Low | 6/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Low | 17/100 |
| Ragweed (Ambrosia) | Low | 25/100 |
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) | None | 0/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | Low | 2/100 | |
| Ragweed (Ambrosia) | Low | 10/100 |
Local Environmental Conditions
Yellowstone National Park is a volcanic plateau with lodgepole pine forest and geothermal meadows. Pine pollen is significant in June and July. Meadow grasses around the geyser basins add to the mix. High elevation compresses the season into just two months.
Yellowstone National Park, a landmark in Yellowstone, opens its pollen season with juniper and cottonwood from March with ash joining in and continuing through April. A grass pollen peak follows through May and June; grass pollen lingers into early September before tapering off. Low humidity and high elevation mean pollen disperses easily once released.
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Frequently Asked Questions About Pollen in Wyoming
Is pollen high in Yellowstone right now?
On 2 September 2026, overall pollen levels in Yellowstone are low. Ambrosia is the main contributor to airborne pollen, while artemisia and grass remain at lower levels
Will pollen levels change in Yellowstone tomorrow?
On 3 September 2026, pollen conditions in Yellowstone will be different from today, with ambrosia at low levels, artemisia at low levels
Is pollen expected to decrease in Yellowstone 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 Yellowstone?
On 2 September 2026, Ambrosia is the dominant pollen source in Yellowstone. artemisia and grass are also present but at lower levels. cypress are not currently active.
When is pollen season in Yellowstone?
How often is the Yellowstone pollen forecast updated?
The Yellowstone pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Yellowstone 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 Yellowstone 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 Yellowstone, 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. |
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).
