Caicó pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Caicó is low; cypress and willow are low.
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
7-Day Trend
Over the next week grass will increase; cypress and willow will decrease.
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Features and forecast availability vary by region.
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 | 14/100 |
| Grass (Poaceae) | None | 0/100 |
| Willow (Salicaceae) | Low | 21/100 |
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 | 18/100 | |
| Grass (Poaceae) | None | 0/100 | |
| Willow (Salicaceae) | Low | 23/100 |
Local Environmental Conditions
Caicó commands the Rio Grande do Norte central sertão as the Seridó region's main city, where native caatinga scrub, mandacaru cactus, and sparse drought-adapted trees are the main pollen sources. The very semi-arid climate produces an extremely compressed wet season from January to April, while the long dry season strongly concentrates pollen production and the open northeastern sertão landscape allows very wide pollen dispersal throughout.
In Caicó, mandacaru cactus and sparse drought-adapted trees pollen disperses continuously through the year with no distinct seasonal boundary, though the wet season from January to April regularly interrupts counts with frequent rainfall.
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Frequently Asked Questions About Pollen in Rio Grande do Norte
Is pollen high in Caicó right now?
On 20 September 2026, overall pollen levels in Caicó are low. Cypress is the main contributor to airborne pollen, while willow remain at lower levels
Will pollen levels change in Caicó tomorrow?
On 21 September 2026, pollen conditions in Caicó will be similar to today, with cypress at low levels, willow at low levels
Is pollen expected to decrease in Caicó this week?
According to the five-day outlook, cypress and willow pollen levels are expected to gradually decrease, while grass pollen will increase, suggesting mixed conditions later in the week.
Which pollen types are currently active in Caicó?
On 20 September 2026, Cypress is the dominant pollen source in Caicó. willow are also present but at lower levels. grass are not currently active.
When is pollen season in Caicó?
How often is the Caicó pollen forecast updated?
The Caicó pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Caicó 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 Caicó 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 Caicó, 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. |
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).
