Chalfont St Peter pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Chalfont St Peter is moderate; mugwort is moderate.
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
7-Day Trend
Over the next week mugwort will increase; cypress, 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) | None | 0/100 |
| Grass (Poaceae) | None | 0/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Moderate | 33/100 |
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 | 49/100 |
Local Environmental Conditions
Around Chalfont St Peter, oak and beech are the dominant species behind local tree pollen, with counts higher near parks than in the centre. Local farmland and hedgerows nearby add meaningful grass pollen through late spring and summer, especially under prevailing westerlies. Locals with allergies tend to plan around two peaks a year rather than one long stretch.
The tree pollen story in Chalfont St Peter is really about oak and beech, in that order. Then grass pollen takes the baton from May all the way to September, usually peaking in June and July — that's when most people really feel it. Oak tends to release pollen between April and May, before beech takes over, usually April to May. Worth factoring in if hay fever's ever been an issue for you here.
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Frequently Asked Questions About Pollen in Buckinghamshire
Is pollen high in Chalfont St Peter right now?
On 20 September 2026, overall pollen levels in Chalfont St Peter are moderate. Artemisia is the main contributor to airborne pollen
Will pollen levels change in Chalfont St Peter tomorrow?
On 21 September 2026, pollen conditions in Chalfont St Peter will be similar to today, with artemisia at moderate levels
Is pollen expected to decrease in Chalfont St Peter this week?
According to the five-day outlook, artemisia pollen levels will increase later in the week.
Which pollen types are currently active in Chalfont St Peter?
On 20 September 2026, Artemisia is the dominant pollen source in Chalfont St Peter. cypress, grass, and willow are not currently active.
When is pollen season in Chalfont St Peter?
How often is the Chalfont St Peter pollen forecast updated?
The Chalfont St Peter pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Chalfont St Peter 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 Chalfont St Peter 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 Chalfont St Peter, 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).
