Quincy, California pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Quincy, California is moderate; mugwort and ragweed are moderate; grass is low.
Pollen Tomorrow
Tomorrow (21 September 2026) grass remains low, mugwort remains moderate, ragweed increasing.
7-Day Trend
Over the next week grass, mugwort, and ragweed will decrease.
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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 | 17/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Moderate | 26/100 |
| Ragweed (Ambrosia) | Moderate | 47/100 |
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 | 23/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | Moderate | 32/100 | |
| Ragweed (Ambrosia) | High | 54/100 |
Local Environmental Conditions
Quincy's setting on the American Valley in the Sierra Nevada foothills supports ponderosa pine, incense cedar, and mountain meadow grasses as the leading local vegetation, all factoring into the pollen count through the year. Local parks and open ground tend to see higher pollen counts than the denser urban core. Nearby towns with similar terrain tend to see a broadly similar pattern.
In Quincy, pollen season begins with olive and acacia starting in January with eucalyptus joining in and continuing through February. Grass pollen builds through March and April, and sagebrush and mugwort extend exposure into early autumn. Onshore Pacific breezes periodically clear the air, though inland valleys can still see elevated counts.
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Pollen forecast neighborhoods 3 neighborhoods
Frequently Asked Questions About Pollen in California
Is pollen high in Quincy, California right now?
On 20 September 2026, overall pollen levels in Quincy, California are moderate. Ambrosia is the main contributor to airborne pollen, while artemisia and grass remain at lower levels
Will pollen levels change in Quincy, California tomorrow?
On 21 September 2026, pollen conditions in Quincy, California will be different from today, with artemisia at moderate levels, grass at low levels and ambrosia increasing
Is pollen expected to decrease in Quincy, California this week?
According to the five-day outlook, ambrosia, artemisia, and grass pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.
Which pollen types are currently active in Quincy, California?
On 20 September 2026, Ambrosia is the dominant pollen source in Quincy, California. artemisia and grass are also present but at lower levels.
When is pollen season in Quincy, California?
How often is the Quincy, California pollen forecast updated?
The Quincy, California pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Quincy, California 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 Quincy, California 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 Quincy, California, 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. |
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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).
