Bentonville pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Bentonville is high; ragweed is high; grass is moderate.
Pollen Tomorrow
Tomorrow (21 September 2026) grass declining, ragweed declining.
7-Day Trend
Over the next week grass, mugwort, and ragweed will increase.
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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) | Moderate | 27/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | None | 0/100 |
| Ragweed (Ambrosia) | High | 56/100 |
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) | Low | 15/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | None | 0/100 | |
| Ragweed (Ambrosia) | Moderate | 42/100 |
Local Environmental Conditions
Bentonville's Benton County Arkansas Ozark setting features cedar, white oak, and hickory as the main tree pollen sources, with exposure varying between the wooded Ozark plateau residential areas and the more built-up commercial corridors around Walmart headquarters and the Crystal Bridges Museum. The Slaughter Pen mountain bike trail creek corridor provides locally significant green space, while the Ozark highland topography creates distinct pollen gradients between ridge and valley locations throughout.
Bentonville's Northwest Arkansas Ozark setting produces a season opening in late January with cedar and elm before oak peaks through March and April. Grass from surrounding Arkansas Ozark farmland peaks through May and June before mugwort and nettle extend exposure into September. The Cedar Creek corridor channels airflows, while the cedar season from December through February is locally significant and the Ozark setting concentrates pollen in valley locations.
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Frequently Asked Questions About Pollen in Arkansas
Is pollen high in Bentonville right now?
On 20 September 2026, overall pollen levels in Bentonville are high. Ambrosia is the main contributor to airborne pollen, while grass remain at lower levels
Will pollen levels change in Bentonville tomorrow?
On 21 September 2026, pollen conditions in Bentonville will be different from today, with grass, ambrosia continuing to decline
Is pollen expected to decrease in Bentonville this week?
According to the five-day outlook, artemisia, grass, and ambrosia pollen levels will increase later in the week.
Which pollen types are currently active in Bentonville?
On 20 September 2026, Ambrosia is the dominant pollen source in Bentonville. grass are also present but at lower levels. artemisia are not currently active.
When is pollen season in Bentonville?
How often is the Bentonville pollen forecast updated?
The Bentonville pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Bentonville 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 Bentonville 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 Bentonville, 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).
