Primrose Hill pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Primrose Hill is moderate; mugwort is moderate.
Pollen Tomorrow
Tomorrow (21 September 2026) mugwort increasing.
7-Day Trend
Over the next week grass and mugwort will increase; cypress 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) | Moderate | 49/100 |
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) | High | 64/100 |
Local Environmental Conditions
Primrose Hill's parks and green spaces feature sycamore and oak as the main tree pollen sources, with exposure varying between these greener areas and the more built-up town centre. Grass pollen from surrounding Camden fields is significant through the summer months, carried in by southwesterly winds. The relatively open, low-lying landscape lets pollen disperse readily across the area through the season.
Want to know what triggers spring allergies in Primrose Hill? Start with sycamore, then oak. Expect sycamore pollen roughly from April to June, while oak follows on from April to May. 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. Worth factoring in if hay fever's ever been an issue for you here.
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Frequently Asked Questions About Pollen in Camden
Is pollen high in Primrose Hill right now?
On 20 September 2026, overall pollen levels in Primrose Hill are moderate. Artemisia is the main contributor to airborne pollen
Will pollen levels change in Primrose Hill tomorrow?
On 21 September 2026, pollen conditions in Primrose Hill will be different from today, with artemisia increasing
Is pollen expected to decrease in Primrose Hill this week?
According to the five-day outlook, artemisia and grass pollen levels will increase later in the week.
Which pollen types are currently active in Primrose Hill?
On 20 September 2026, Artemisia is the dominant pollen source in Primrose Hill. cypress, grass, and willow are not currently active.
When is pollen season in Primrose Hill?
How often is the Primrose Hill pollen forecast updated?
The Primrose Hill pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Primrose Hill 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 Primrose Hill 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 Primrose Hill, 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).
