Saint-Denis pollen forecast - today, tomorrow and the week ahead
Today (9 August) pollen in Saint-Denis is high; mugwort is high; grass is low. Tomorrow (10 August 2026) levels are similar - mugwort remains high. Over the following five days grass will increase; mugwort will decrease. Forecasts are calculated by Airmine using satellites to map local vegetation and determine pollen season onset.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Saint-Denis' urban setting in Seine-Saint-Denis features oak, plane, and linden as the main tree pollen sources in parks and along streets, with exposure varying between green areas and the densely built city centre. As part of the greater Paris metropolitan area, local sources dominate, though surrounding Île-de-France farmland contributes additional grass and tree pollen under prevailing westerly winds.
Today - 9 August
-
Alder (Alnus):
None
0/100
-
Birch (Betula):
None
0/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
None
0/100
-
Grass (Poaceae):
Low
23/100
-
Willow (Salicaceae):
None
0/100
-
Mugwort (Artemisia):
High
70/100
High pollen levels may trigger sneezing, itchy eyes, and congestion. Airmine's neighbourhood estimates use satellites to map local vegetation and a statistical prediction model, updated four times daily.
Tomorrow - 10 August
-
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
Air quality in Saint-Denis
View air qualityFrequently Asked Questions
Is pollen high in Saint-Denis right now?
On 9 August 2026, overall pollen levels in Saint-Denis are high. Artemisia is the main contributor to airborne pollen, while grass remain at lower levels
Will pollen levels change in Saint-Denis tomorrow?
On 10 August 2026, pollen conditions in Saint-Denis will be different from today, with artemisia at high levels
Is pollen expected to decrease in Saint-Denis this week?
According to the five-day outlook, artemisia 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 Saint-Denis?
On 9 August 2026, Artemisia is the dominant pollen source in Saint-Denis. grass are also present but at lower levels. hazel, cypress, and willow are not currently active.
When is pollen season in Saint-Denis?
How often is the Saint-Denis pollen forecast updated?
The Saint-Denis pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Saint-Denis 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 Saint-Denis 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 Saint-Denis, 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.
Want to see pollen forecasts for other cities in France?
Check pollen in other popular cities:
Data provided by Airmine — Last update: 9 August 2026 at 20:27 CEST (Data is updated four times daily.)
This page provides the latest public pollen forecast for Saint-Denis.
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Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.