Rhayader pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Rhayader is none
Pollen Tomorrow
Tomorrow (21 September 2026) mugwort at moderate levels.
7-Day Trend
Over the next week mugwort will decrease; cypress, grass, and willow will remain stable.
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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) | None | 0/100 |
| Grass (Poaceae) | None | 0/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | 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) | None | 0/100 | |
| Grass (Poaceae) | None | 0/100 | |
| Willow (Salicaceae) | None | 0/100 | |
| Mugwort (Artemisia) | Moderate | 32/100 |
Local Environmental Conditions
In Rhayader, oak and ash dominate the local tree pollen picture, with parks and tree-lined residential streets offering more exposure than the compact centre. The wider Powys countryside supplies additional tree and grass pollen, particularly when cooler northerly winds carry it toward the built-up area. It's a pattern shared by plenty of similarly sized towns nearby, shaped more by geography than anything unusual locally.
In Rhayader, the pollen calendar starts with oak and rolls straight into ash. Grass season overlaps a lot of this too, running May through September and peaking mid-summer. You'll usually see oak pollen from around April through May, before ash takes over, usually March to May. Useful to know if you tend to feel it every spring.
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Frequently Asked Questions About Pollen in Powys
Is pollen high in Rhayader right now?
Currently, there is no significant pollen in Rhayader.
Will pollen levels change in Rhayader tomorrow?
On 21 September 2026, pollen conditions in Rhayader will be different from today, with artemisia at moderate levels
Is pollen expected to decrease in Rhayader this week?
According to the five-day outlook, artemisia pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.
Which pollen types are currently active in Rhayader?
On 20 September 2026, there are no significant pollen types in Rhayader.
When is pollen season in Rhayader?
How often is the Rhayader pollen forecast updated?
The Rhayader pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Rhayader 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 Rhayader 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 Rhayader, 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).
