Tracy pollen forecast — Swift Lake Park neighborhood
Pollen Today
Today (2 September) pollen in Swift Lake Park, Tracy is moderate; ragweed is moderate; grass and mugwort are low.
Pollen Tomorrow
Tomorrow (3 September 2026) grass increasing, mugwort increasing, ragweed increasing.
7-Day Trend
Over the next week grass, mugwort, and ragweed will decrease; cypress will remain stable.
Forecasts are calculated by Airmine using satellites to map local vegetation and determine pollen season onset. Airmine's estimates use satellites to map local vegetation and a statistical prediction model, updated four times daily. Developed with support from the European Space Agency (ESA) Business Applications and Space Solutions (BASS) team.
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Air Quality
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Pollen Risk
Today - 2 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 | 15/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Low | 21/100 |
| Ragweed (Ambrosia) | Moderate | 46/100 |
Tomorrow - 3 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) | High | 57/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | High | 62/100 | |
| Ragweed (Ambrosia) | High | 70/100 |
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 Tracy right now?
On 2 September 2026, overall pollen levels in Tracy are moderate. Ambrosia is the main contributor to airborne pollen, while grass and artemisia remain at lower levels
Will pollen levels change in Tracy tomorrow?
On 3 September 2026, pollen conditions in Tracy will be different from today, with grass, ambrosia, artemisia increasing
Is pollen expected to decrease in Tracy this week?
According to the five-day outlook, grass, ambrosia, and artemisia pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.
Which pollen types are currently active in Tracy?
On 2 September 2026, Ambrosia is the dominant pollen source in Tracy. grass and artemisia are also present but at lower levels. cypress are not currently active.
When is pollen season in Tracy?
How often is the Tracy pollen forecast updated?
The Tracy pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Tracy 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 Tracy 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 Tracy, 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 exposure is expected to be minimal. |
| Low | 0-25 | Low risk of exposure. Small amounts of pollen may be present. |
| Moderate | 25-50 | Moderate risk of exposure. Pollen exposure is expected to be noticeable. |
| High | 50-75 | High risk of exposure. Elevated pollen exposure is expected. |
| Very High | 75-100 | Very high risk of exposure. Pollen exposure is expected to be at or near its highest levels. |
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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).
