Saint-Étienne pollen forecast - today, tomorrow and the week ahead

Today (16 July) pollen in Saint-Étienne is medium; grass is medium. Tomorrow (17 July 2026) levels are similar - grass declining. Over the following five days grass will increase. Forecasts are calculated by Airmine using satellites to map local vegetation and determine pollen season onset.

For long term forecasts and maps, see the Airmine app

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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-Étienne's green spaces and the Loire River headwaters corridor feature oak, birch, and linden as the main tree pollen sources, with exposure varying between these areas and the more built-up industrial city centre. Surrounding Massif Central farmland and the Pilat Regional Park woodland contribute substantial tree and grass pollen, while the elevated valley setting channels airflows and concentrates pollen across the city.

Today - 16 July

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    None

    0/100

  • Grass (Poaceae):

    Medium

    30/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    None

    0/100

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 - 17 July

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    None

    0/100

  • Grass (Poaceae):

    Low

    12/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    None

    0/100

Air quality in Saint-Étienne

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Frequently Asked Questions

Is pollen high in Saint-Étienne right now?

On 16 July 2026, overall pollen levels in Saint-Étienne are moderate. Grass is the main contributor to airborne pollen

Will pollen levels change in Saint-Étienne tomorrow?

On 17 July 2026, pollen conditions in Saint-Étienne will be different from today, with grass continuing to decline

Is pollen expected to decrease in Saint-Étienne this week?

According to the five-day outlook, grass pollen levels will increase later in the week.

Which pollen types are currently active in Saint-Étienne?

On 16 July 2026, Grass is the dominant pollen source in Saint-Étienne. cypress, willow, alder, artemisia, birch, and hazel are not currently active.

When is pollen season in Saint-Étienne?
Saint-Étienne's elevated Loire headwaters setting means the season begins slightly later than in lower-lying French cities. Hazel and alder open from January before birch peaks through April, with grass from surrounding Massif Central farmland and the Pilat Regional Park peaking through June and July. The valley setting concentrates pollen, while the continental climate produces a well-defined seasonal progression.
How often is the Saint-Étienne pollen forecast updated?

The Saint-Étienne pollen forecast is updated four times daily. See the timestamp below for the most recent update.

Does pollen in Saint-Étienne 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-Étienne 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-Étienne, 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?

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Check pollen in other popular cities:

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Data provided by Airmine — Last update: 16 July 2026 at 05:36 CEST (Data is updated four times daily.)

This page provides the latest public pollen forecast for Saint-Étienne.

For long term forecasts and maps, see the Airmine app

Download on the App Store Get it on Google Play

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