Decker Canyon Camp, Unincorporated Santa Monica Mountains Pollen Forecast - Today, Tomorrow and the Week Ahead
Pollen Today
Today (7 October) pollen in Decker Canyon Camp, Unincorporated Santa Monica Mountains is moderate; ragweed and mold (cladosporium) are moderate; grass, mugwort, and mold (alternaria) are low.
Pollen Tomorrow
Tomorrow (8 October 2026) grass remains low, ragweed remains moderate, mold (alternaria) remains low, mold (cladosporium) declining, mugwort no longer expected.
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 - 7 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 | 18/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Low | 2/100 |
| Ragweed (Ambrosia) | Moderate | 44/100 |
| Alternaria | Low | 24/100 |
| Cladosporium | Moderate | 27/100 |
Tomorrow - 8 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 | 13/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | None | 0/100 | |
| Ragweed (Ambrosia) | Moderate | 40/100 | |
| Alternaria | Low | 22/100 | |
| Cladosporium | Low | 24/100 |
Local Environmental Conditions
Most of the area around this part of Unincorporated Santa Monica Mountains is open grassland, with a good deal of woodland. Running water nearby means riverside trees such as willow and plane tree are part of the local pollen picture. The leading allergenic tree nearby is oak, with plane tree close behind. Grass pollen is plentiful, while ragweed and mugwort lead among the weeds.
Oak and plane tree lead the season in early spring, as temperatures climb to around 15°C, and tree pollen reaches its peak. Grasses take over in late spring and keep pollen in the air into mid-fall. Ragweed and mugwort bring a final peak from late summer into mid-fall. 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 Unincorporated Santa Monica Mountains right now?
On 7 October 2026, overall pollen levels in Unincorporated Santa Monica Mountains are moderate. Ambrosia is the main contributor to airborne pollen, while artemisia and grass remain at lower levels
Will pollen levels change in Unincorporated Santa Monica Mountains tomorrow?
On 8 October 2026, pollen conditions in Unincorporated Santa Monica Mountains will be different from today, with ambrosia at moderate levels, grass at low levels
Is pollen expected to decrease in Unincorporated Santa Monica Mountains 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 Unincorporated Santa Monica Mountains?
On 7 October 2026, Ambrosia is the dominant pollen source in Unincorporated Santa Monica Mountains. artemisia and grass are also present but at lower levels.
When is pollen season in Unincorporated Santa Monica Mountains?
How often is the Unincorporated Santa Monica Mountains pollen forecast updated?
The Unincorporated Santa Monica Mountains pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Unincorporated Santa Monica Mountains 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 Unincorporated Santa Monica Mountains 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 Unincorporated Santa Monica Mountains, 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).
