Barnum pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Barnum is moderate; ragweed is moderate.
Pollen Tomorrow
Tomorrow (21 September 2026) ragweed declining.
7-Day Trend
Over the next week grass and ragweed will increase; mugwort will remain stable.
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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) | None | 0/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | None | 0/100 |
| Ragweed (Ambrosia) | Moderate | 33/100 |
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 | 22/100 |
Local Environmental Conditions
For Barnum, here, just outside the immediate area, hazel and willow take root along the waterway, both prolific contributors to early pollen counts. Green space with maintained lawn and planted trees, both contributing to grass and ragweed counts; this sits nearby. Neighboring areas with similar land cover tend to show a closely matching pollen mix.
Around Barnum, the bank's hazel and willow kick off the pollen season ahead of the rest, climbing steadily from late winter into March. Grass pollen counts rise through late spring, reaching their peak around June, and ragweed later takes the lead from mid-August through October. Local weather swings can shift these windows slightly, but the overall order tends to hold.
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Pollen forecast neighborhoods 2 neighborhoods
Frequently Asked Questions About Pollen in Minnesota
Is pollen high in Barnum right now?
On 20 September 2026, overall pollen levels in Barnum are moderate. Ambrosia is the main contributor to airborne pollen
Will pollen levels change in Barnum tomorrow?
On 21 September 2026, pollen conditions in Barnum will be different from today, with ambrosia continuing to decline
Is pollen expected to decrease in Barnum this week?
According to the five-day outlook, ambrosia and grass pollen levels will increase later in the week.
Which pollen types are currently active in Barnum?
On 20 September 2026, Ambrosia is the dominant pollen source in Barnum. artemisia and grass are not currently active.
When is pollen season in Barnum?
How often is the Barnum pollen forecast updated?
The Barnum pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Barnum 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 Barnum 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 Barnum, 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).
