American Canyon Pollen Forecast - Today, Tomorrow and the Week Ahead
Pollen Today
Today (10 October) pollen in American Canyon is moderate; ragweed and mold (cladosporium) are moderate; grass and mold (alternaria) are low.
Pollen Tomorrow
Tomorrow (11 October 2026) ragweed remains moderate, mold (alternaria) remains low, mold (cladosporium) remains moderate, grass increasing.
7-Day Trend
Over the next week grass, mugwort, ragweed, and mold (alternaria) will increase; mold (cladosporium) will decrease.
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Pollen Risk
Today - 10 October
| 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 | 17/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | None | 0/100 |
| Ragweed (Ambrosia) | Moderate | 27/100 |
| Mold (Alternaria) | Low | 20/100 |
| Mold (Cladosporium) | Moderate | 35/100 |
Tomorrow - 11 October
| 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 | 27/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | None | 0/100 | |
| Ragweed (Ambrosia) | Moderate | 38/100 | |
| Mold (Alternaria) | Low | 24/100 | |
| Mold (Cladosporium) | Moderate | 36/100 |
Local Environmental Conditions
American Canyon is surrounded mainly by built-up land, with a good deal of open grassland. A nearby park adds mown lawns and planted trees to the local pollen mix. Of the allergenic trees nearby, oak matters most, while maple also contributes. Grasses also feature strongly, alongside plantain and pigweed among the weeds.
Oak and maple lead the season in mid-spring, as temperatures climb to around 10°C, and tree pollen reaches its peak. Grass pollen follows, peaking in early summer and easing off by early fall. Plantain and pigweed bring a final peak from mid-spring into early fall. Rain is heaviest in winter, often giving short breaks from high pollen levels.
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Frequently Asked Questions About Pollen in California
Is pollen high in American Canyon right now?
On 10 October 2026, overall pollen levels in American Canyon are moderate. Ambrosia is the main contributor to airborne pollen, while grass remain at lower levels
Will pollen levels change in American Canyon tomorrow?
On 11 October 2026, pollen conditions in American Canyon will be different from today, with ambrosia at moderate levels and grass increasing
Is pollen expected to decrease in American Canyon 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 American Canyon?
On 10 October 2026, Ambrosia is the dominant pollen source in American Canyon. grass are also present but at lower levels. artemisia are not currently active.
When is pollen season in American Canyon?
How often is the American Canyon pollen forecast updated?
The American Canyon pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in American Canyon 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 American Canyon 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 American Canyon, 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 pollen scores represent risk levels, not direct pollen measurements. Higher scores indicate higher risk.
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).
