Mount Rushmore pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Mount Rushmore is none
Pollen Tomorrow
Tomorrow (21 September 2026) ragweed at low levels.
7-Day Trend
Over the next week grass, mugwort, and ragweed will increase.
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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 - 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) | None | 0/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | None | 0/100 |
| Ragweed (Ambrosia) | None | 0/100 |
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) | Low | 5/100 |
Local Environmental Conditions
Mount Rushmore National Memorial is a black Hills ponderosa pine forest. Pine pollen coats everything in a fine yellow dust through May and June. Granite outcrops interrupt the forest but offer little vegetation — pollen comes entirely from the surrounding trees.
As a landmark within Mount Rushmore, Mount Rushmore National Memorial follows the same seasonal pollen curve, opening with elm and cottonwood from March with ash following close behind through April. Grass pollen builds through May and June, and ragweed pollen builds through late summer into September. Surrounding farmland is a major contributor to both the spring grass peak and the late-summer ragweed season, a pattern felt across this part of Mount Rushmore.
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Frequently Asked Questions About Pollen in South Dakota
Is pollen high in Mount Rushmore right now?
Currently, there is no significant pollen in Mount Rushmore.
Will pollen levels change in Mount Rushmore tomorrow?
On 21 September 2026, pollen conditions in Mount Rushmore will be different from today, with ambrosia at low levels
Is pollen expected to decrease in Mount Rushmore 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 Mount Rushmore?
On 20 September 2026, there are no significant pollen types in Mount Rushmore.
When is pollen season in Mount Rushmore?
How often is the Mount Rushmore pollen forecast updated?
The Mount Rushmore pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Mount Rushmore 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 Mount Rushmore 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 Mount Rushmore, 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).
