San Miguel Pollen Forecast - Today, Tomorrow and the Week Ahead
Pollen Today
Today (6 October) pollen in San Miguel is high; ragweed is high; grass and mold (alternaria) are moderate; mugwort and mold (cladosporium) are low.
Pollen Tomorrow
Tomorrow (7 October 2026) grass remains moderate, mugwort remains low, ragweed remains high, mold (alternaria) remains moderate, mold (cladosporium) increasing.
7-Day Trend
Over the next week grass, mugwort, 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 | 37/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Low | 8/100 |
| Ragweed (Ambrosia) | High | 59/100 |
| Alternaria | Moderate | 35/100 |
| Cladosporium | Low | 25/100 |
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 | 42/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | Low | 14/100 | |
| Ragweed (Ambrosia) | High | 64/100 | |
| Alternaria | Moderate | 47/100 | |
| Cladosporium | Moderate | 35/100 |
Local Environmental Conditions
The area around the center of San Miguel is a mix of open grassland and built-up land. With a watercourse close by, riverside vegetation contributes to the local mix. In the immediate area, open grassland adds grass and weed pollen. Street trees, private gardens and mown lawns add to local pollen in the more built-up surroundings.
Grasses take over in late spring, with temperatures around 15°C, and their pollen lingers into early fall. Weeds on open ground add a smaller late peak from early summer into early fall. Rain is heaviest in winter, often giving short breaks from high pollen levels. Actual levels on any given day depend on the weather, with dry, breezy days the worst and wet days the mildest.
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Frequently Asked Questions About Pollen in California
Is pollen high in San Miguel right now?
On 6 October 2026, overall pollen levels in San Miguel are high. Ambrosia is the main contributor to airborne pollen, while grass and artemisia remain at lower levels
Will pollen levels change in San Miguel tomorrow?
On 7 October 2026, pollen conditions in San Miguel will be similar to today, with artemisia at low levels, grass at moderate levels, ambrosia at high levels
Is pollen expected to decrease in San Miguel this week?
According to the five-day outlook, artemisia, grass, and ambrosia pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.
Which pollen types are currently active in San Miguel?
On 6 October 2026, Ambrosia is the dominant pollen source in San Miguel. grass and artemisia are also present but at lower levels.
When is pollen season in San Miguel?
How often is the San Miguel pollen forecast updated?
The San Miguel pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in San Miguel 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 Miguel 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 Miguel, 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).
