Monte Rio Pollen Forecast - Today, Tomorrow and the Week Ahead
Pollen Today
Today (6 October) pollen in Monte Rio is moderate; ragweed is moderate; grass, mugwort, mold (alternaria), and mold (cladosporium) are low.
Pollen Tomorrow
Tomorrow (7 October 2026) grass remains low, mold (alternaria) remains low, mold (cladosporium) remains low, ragweed declining, mugwort no longer expected.
7-Day Trend
Over the next week grass, mugwort, ragweed, and mold (cladosporium) will increase; mold (alternaria) will decrease.
Explore Forecasts
Air Quality & Mold
Pollen for Neighborhoods
Air Quality in Other Cities
Get More in Our App
Local pollen and air quality forecasts, interactive pollen maps and route profiles
Features and forecast availability vary by region.
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) | Low | 17/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Low | 10/100 |
| Ragweed (Ambrosia) | Moderate | 39/100 |
| Alternaria | Low | 12/100 |
| Cladosporium | Low | 21/100 |
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) | Low | 3/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | None | 0/100 | |
| Ragweed (Ambrosia) | Low | 25/100 | |
| Alternaria | Low | 13/100 | |
| Cladosporium | Low | 18/100 |
Local Environmental Conditions
The center of Monte Rio is heavily wooded. The damp ground beside running water nearby supports trees, shrubs and reeds, adding to local pollen. Among allergenic trees nearby, hazel leads, followed by maple. Grass pollen is plentiful, while plantain and mugwort lead among the weeds. Undergrowth, clearings and woodland edges add smaller amounts of grass and herb pollen.
The pollen year starts in early spring, when hazel flowers. Maple follows in mid-spring, as temperatures climb to around 10°C, and tree pollen reaches its peak. Grasses take over in midsummer, with temperatures around 20°C, and their pollen lingers into early fall. The season closes with plantain and mugwort from late spring into early fall.
Get pollen & AQ on Strava
Follow your environmental exposure and performance with the free Airmine-Strava integration. See your pollen and air quality exposure for every Strava activity.
Resource Hub
Pollen forecast neighborhoods 5 neighborhoods
Frequently Asked Questions About Pollen in California
Is pollen high in Monte Rio right now?
On 6 October 2026, overall pollen levels in Monte Rio are moderate. Ambrosia is the main contributor to airborne pollen, while grass and artemisia remain at lower levels
Will pollen levels change in Monte Rio tomorrow?
On 7 October 2026, pollen conditions in Monte Rio will be different from today, with grass at low levels and ambrosia continuing to decline
Is pollen expected to decrease in Monte Rio this week?
According to the five-day outlook, grass, ambrosia, and artemisia pollen levels will increase later in the week.
Which pollen types are currently active in Monte Rio?
On 6 October 2026, Ambrosia is the dominant pollen source in Monte Rio. grass and artemisia are also present but at lower levels.
When is pollen season in Monte Rio?
How often is the Monte Rio pollen forecast updated?
The Monte Rio pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Monte Rio 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 Monte Rio 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 Monte Rio, 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).
