Calaveras County Historical Museum, San Andreas Pollen Forecast - Today, Tomorrow and the Week Ahead
Pollen Today
Today (6 October) pollen in Calaveras County Historical Museum, San Andreas is moderate; grass and ragweed are moderate; mold (alternaria) and mold (cladosporium) are low.
Pollen Tomorrow
Tomorrow (7 October 2026) grass remains moderate, ragweed remains moderate, mold (alternaria) remains low, mold (cladosporium) remains low, mugwort at low levels.
7-Day Trend
Over the next week mugwort will increase; grass, ragweed, mold (alternaria), and mold (cladosporium) will decrease.
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Pollen Risk
Today - 6 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) | Moderate | 30/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | None | 0/100 |
| Ragweed (Ambrosia) | Moderate | 45/100 |
| Alternaria | Low | 17/100 |
| Cladosporium | Low | 22/100 |
Tomorrow - 7 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 | 33/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | Low | 2/100 | |
| Ragweed (Ambrosia) | Moderate | 48/100 | |
| Alternaria | Low | 16/100 | |
| Cladosporium | Low | 22/100 |
Local Environmental Conditions
Woodland makes up around 41% of the area near this location in San Andreas, with a good deal of open grassland and some built-up land. Along a stream or river nearby, trees, shrubs and reeds grow in the damper ground and add their own pollen. Trees are an important local pollen source, given how much woodland surrounds the area. Grasses are also a significant pollen source here.
Over the course of the year, trees are the first to release pollen, with a peak around early spring. Grasses take over, peaking around late spring and fading by midsummer. The season closes with a lower weed peak from early summer into early fall, mostly from roadside and field-edge plants. Here, temperatures range from around 10°C in the coldest month to around 25°C in the warmest.
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Frequently Asked Questions About Pollen in California
Is pollen high in San Andreas right now?
On 6 October 2026, overall pollen levels in San Andreas are moderate. Ambrosia is the main contributor to airborne pollen, while grass remain at lower levels
Will pollen levels change in San Andreas tomorrow?
On 7 October 2026, pollen conditions in San Andreas will be different from today, with ambrosia at moderate levels, artemisia at low levels, grass at moderate levels
Is pollen expected to decrease in San Andreas this week?
According to the five-day outlook, ambrosia and grass pollen levels are expected to gradually decrease, while artemisia pollen will increase, suggesting mixed conditions later in the week.
Which pollen types are currently active in San Andreas?
On 6 October 2026, Ambrosia is the dominant pollen source in San Andreas. grass are also present but at lower levels. artemisia are not currently active.
When is pollen season in San Andreas?
How often is the San Andreas pollen forecast updated?
The San Andreas pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in San Andreas 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 San Andreas 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 San Andreas, 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. |
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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).
