Depot Park Museum, Sonoma Pollen Forecast - Today, Tomorrow and the Week Ahead
Pollen Today
Today (11 October) pollen in Depot Park Museum, Sonoma is moderate; mold (cladosporium) is moderate; grass, ragweed, and mold (alternaria) are low.
Pollen Tomorrow
Tomorrow (12 October 2026) grass remains low, mold (alternaria) remains low, mold (cladosporium) remains moderate, ragweed 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 - 11 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 | 8/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | None | 0/100 |
| Ragweed (Ambrosia) | Low | 20/100 |
| Mold (Alternaria) | Low | 15/100 |
| Mold (Cladosporium) | Moderate | 26/100 |
Tomorrow - 12 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) | Low | 16/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | None | 0/100 | |
| Ragweed (Ambrosia) | Moderate | 28/100 | |
| Mold (Alternaria) | Low | 20/100 | |
| Mold (Cladosporium) | Moderate | 28/100 |
Local Environmental Conditions
Woodland and built-up land share the area around this site in Sonoma, plus some open grassland. Along a watercourse nearby, trees, shrubs and reeds grow in the damper ground and add their own pollen. The leading allergenic tree nearby is oak, with maple close behind. Beyond the trees, grasses matter a great deal, and plantain is the main weed source.
Tree pollen peaks in mid-spring, when the weather warms to around 15°C and oak and maple are in full flower. Grass pollen follows, peaking in late spring and easing off by early fall. Plantain flowers through much of the warmer half of the year. Winter is the wettest time of year, and heavy showers can bring short breaks in pollen.
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Frequently Asked Questions About Pollen in California
Is pollen high in Sonoma right now?
On 11 October 2026, overall pollen levels in Sonoma are low. Ambrosia is the main contributor to airborne pollen, while grass remain at lower levels
Will pollen levels change in Sonoma tomorrow?
On 12 October 2026, pollen conditions in Sonoma will be different from today, with grass at low levels and ambrosia increasing
Is pollen expected to decrease in Sonoma 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 Sonoma?
On 11 October 2026, Ambrosia is the dominant pollen source in Sonoma. grass are also present but at lower levels. artemisia are not currently active.
When is pollen season in Sonoma?
How often is the Sonoma pollen forecast updated?
The Sonoma pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Sonoma 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 Sonoma 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 Sonoma, 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).
