São José de Ribamar pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in São José de Ribamar is low; cypress is low.
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
7-Day Trend
Over the next week cypress will decrease; grass and willow will remain stable.
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Pollen Risk
Today - 20 September
| Pollen species | Level | Value |
|---|---|---|
| Alder (Alnus) | None | 0/100 |
| Birch (Betula) | None | 0/100 |
| Hazel (Corylus) | None | 0/100 |
| Cypress (Cupressaceae) | Low | 19/100 |
| Grass (Poaceae) | None | 0/100 |
| Willow (Salicaceae) | None | 0/100 |
Tomorrow - 21 September
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| Alder (Alnus) | None | 0/100 | — |
| Birch (Betula) | None | 0/100 | — |
| Hazel (Corylus) | None | 0/100 | — |
| Cypress (Cupressaceae) | Low | 19/100 | |
| Grass (Poaceae) | None | 0/100 | |
| Willow (Salicaceae) | None | 0/100 |
Local Environmental Conditions
São José de Ribamar occupies the São Luís eastern metropolitan coast in Maranhão, where native Atlantic Forest remnants, restinga coastal scrub, and mangrove vegetation are the main pollen sources. The wet season from December to June provides the most frequent rainfall interruptions, while the dry season concentrates pollen dispersal and the coastal position means trade winds frequently disperse pollen throughout this São Luís eastern metropolitan municipality.
In São José de Ribamar, restinga coastal scrub and mangrove vegetation pollen disperses continuously through the year with no distinct seasonal boundary, though the wet season from December to June regularly interrupts counts with frequent rainfall.
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Frequently Asked Questions About Pollen in Maranhão
Is pollen high in São José de Ribamar right now?
On 20 September 2026, overall pollen levels in São José de Ribamar are low. Cypress is the main contributor to airborne pollen
Will pollen levels change in São José de Ribamar tomorrow?
On 21 September 2026, pollen conditions in São José de Ribamar will be similar to today, with cypress at low levels
Is pollen expected to decrease in São José de Ribamar this week?
According to the five-day outlook, cypress pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.
Which pollen types are currently active in São José de Ribamar?
On 20 September 2026, Cypress is the dominant pollen source in São José de Ribamar. willow and grass are not currently active.
When is pollen season in São José de Ribamar?
How often is the São José de Ribamar pollen forecast updated?
The São José de Ribamar pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in São José de Ribamar 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 São José de Ribamar 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 São José de Ribamar, 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 scores represent risk levels, not direct measurements of pollen or air pollutant concentrations. Higher scores indicate higher risk. Pollen and air quality use different thresholds.
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).
