Swift Lake Park pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Swift Lake Park is high; ragweed is high; grass and mugwort are low.
Pollen Tomorrow
Tomorrow (21 September 2026) ragweed declining, grass no longer expected, mugwort no longer expected.
7-Day Trend
Over the next week grass, mugwort, and ragweed will increase.
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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) | Low | 13/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Low | 20/100 |
| 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) | None | 0/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | None | 0/100 | |
| Ragweed (Ambrosia) | Low | 24/100 |
Local Environmental Conditions
Around Swift Lake Park, moisture-loving hazel and willow dominate the bank, both quick to release pollen on the wind, a short distance from here. This area, close to this spot, has a wooded area built around oak and birch, both contributing heavily to the region's spring pollen totals. Nearby, nearby, a park whose lawns and ornamental trees quietly add to grass and ragweed pollen levels.
For Swift Lake Park, hazel and willow by the water are typically first out of the gate, usually peaking sometime between late winter and the end of March. Grass pollen builds through late spring and peaks in June, before ragweed pollen takes center stage across mid-August into October. Small variations in local weather can nudge these windows a few days in either direction.
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Frequently Asked Questions About Pollen in Minnesota
Is pollen high in Swift Lake Park right now?
On 20 September 2026, overall pollen levels in Swift Lake Park are high. Ambrosia is the main contributor to airborne pollen, while artemisia and grass remain at lower levels
Will pollen levels change in Swift Lake Park tomorrow?
On 21 September 2026, pollen conditions in Swift Lake Park will be different from today, with ambrosia continuing to decline
Is pollen expected to decrease in Swift Lake Park 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 Swift Lake Park?
On 20 September 2026, Ambrosia is the dominant pollen source in Swift Lake Park. artemisia and grass are also present but at lower levels.
When is pollen season in Swift Lake Park?
How often is the Swift Lake Park pollen forecast updated?
The Swift Lake Park pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Swift Lake Park 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 Swift Lake Park 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 Swift Lake Park, 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).
