Twin Falls pollen forecast — Shoshone Falls Park neighborhood
Pollen Today
Today (20 September) pollen in Shoshone Falls Park, Twin Falls is moderate; grass, mugwort, and ragweed are moderate.
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
7-Day Trend
Over the next week grass, mugwort, and ragweed will decrease.
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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) | Moderate | 35/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Moderate | 30/100 |
| Ragweed (Ambrosia) | Moderate | 39/100 |
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) | Moderate | 33/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | Moderate | 29/100 | |
| Ragweed (Ambrosia) | Moderate | 38/100 |
Local Environmental Conditions
Shoshone Falls Park occupies a park overlooking a major waterfall on the Snake River, and its plant life mirrors the rest of Twin Falls, so seasonal pollen sources here match the broader regional pattern. Visitors should expect roughly the same seasonal pattern as elsewhere in the city, with only minor local variation.
Twin Falls's regional pollen pattern holds at Shoshone Falls Park, with juniper and cottonwood first appearing in March then ash follows, running through April. A grass pollen peak follows through May and June; grass pollen lingers into early September before tapering off. The dry mountain climate offers fewer rain breaks than more humid parts of the country, consistent with the wider Twin Falls area.
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Frequently Asked Questions About Pollen in Idaho
Is pollen high in Twin Falls right now?
On 20 September 2026, overall pollen levels in Twin Falls are moderate. Ambrosia is the main contributor to airborne pollen, while artemisia and grass remain at lower levels
Will pollen levels change in Twin Falls tomorrow?
On 21 September 2026, pollen conditions in Twin Falls will be similar to today, with ambrosia at moderate levels, artemisia at moderate levels, grass at moderate levels
Is pollen expected to decrease in Twin Falls this week?
According to the five-day outlook, ambrosia, artemisia, and grass pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.
Which pollen types are currently active in Twin Falls?
On 20 September 2026, Ambrosia is the dominant pollen source in Twin Falls. artemisia and grass are also present but at lower levels.
When is pollen season in Twin Falls?
How often is the Twin Falls pollen forecast updated?
The Twin Falls pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Twin Falls 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 Twin Falls 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 Twin Falls, 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).
