Is the air in Lyon safe today?

Yes. Right now the US AQI in Lyon is 40, which counts as good. Great air. A perfect time to be outside. It is expected to reach 70 (moderate) around Sat 12:00.

When is the best time to be outside in Lyon?

Sat 15:00–18:00. That is the cleanest stretch in the next 24 hours, with the US AQI averaging about 42. The worst hour is around Sat 12:00, at 70.

What is the main pollutant in Lyon?

Fine particles (PM2.5). It drives the index right now, at 7.2 µg/m³. Tiny particles from combustion, fires and dust that reach deep into the lungs. The main driver of AQI worldwide.

How does Lyon's air compare with the WHO guideline?

Within the guideline. Over the next 24 hours PM2.5 averages about 12 µg/m³, against the World Health Organization's 24-hour guideline of 15 µg/m³. The other pollutants stay within their guideline levels.

How many cigarettes is a day of Lyon's air?

About 0.6 cigarettes. Over the next 24 hours PM2.5 averages about 12 µg/m³. By Berkeley Earth's rule of thumb, 22 µg/m³ breathed for a day is roughly one cigarette.

Will air quality in Lyon improve this week?

Sunday looks cleanest. Its AQI peaks at 30, against 70 on Saturday, the worst day in the forecast.

Lyon air quality

France · Live AQI and hourly forecast for the next 5 days · valid Fri 18:00 local time

Good

US AQI, mostly PM_2.5

Model estimate. Nearby measurements are shown separately.

Great air. A perfect time to be outside.

Next 24 hours: 36–70US AQI, highest around Sat 12:00
Best time outside: Sat 15:00–18:00US AQI about 42
PM_2.5 vs WHO guideline: 0.8×12 µg/m³ over 24 h, guideline 15
Cigarette equivalent: ≈ 0.6 a dayBerkeley Earth rule of thumb

Loading the live globe…

The live globe, centred on Lyon. Switch pollutants, drag through the next 5 days or press play. Full map →

Pollutants in Lyon right now

Pollutant	Now	Level	Next 24 h vs WHO
Fine particles PM_2.5	7.2 µg/m³	Good	0.8×
Coarse particles PM₁₀	12 µg/m³	Good	0.4×
Nitrogen dioxide NO₂	16 µg/m³	Good	0.8×
Ozone O₃	51 µg/m³	Good	0.4×
Sulphur dioxide SO₂	1.2 µg/m³	Good	0.1×
Carbon monoxide CO	207 µg/m³	Good	0.1×
Aerosol optical depth	0.05	Whole atmosphere · dimensionless
Desert dust	0 µg/m³	Modelled surface dust
UV index	0	Low

“Next 24 h vs WHO” compares the forecast with the World Health Organization’s 2021 guideline levels: 24-hour means of 15 µg/m³ for PM_2.5, 45 for PM₁₀, 25 for NO₂, 40 for SO₂ and 4 mg/m³ for CO, and 100 µg/m³ over 8 hours for ozone. Above 1× is above the guideline. Levels follow the US AQI, which is far less strict than the WHO, so air rated Good can still be above a guideline.

Next 48 hours

Hourly US AQI. Highest 70 around Sat 12:00, lowest 20 around Sun 08:00.

Good 0–50Moderate 51–100Sensitive 101–150Unhealthy 151–200Very unhealthy 201–300Hazardous 301+

5-day air quality forecast for Lyon

Daily range of the hourly US AQI, from lowest to highest, on a scale of 0 to 150.

Day	US AQI	At worst	Worst hour	PM_2.5 avg	UV max
Fri 13 Nov	34–55	Moderate	8:00	8.9	2 Low
Sat 14 Nov	26–70	Moderate	12:00	12	2 Low
Sun 15 Nov	20–30	Good	13:00	3.1	1 Low
Mon 16 Nov	20–60	Moderate	22:00	5.0	1 Low
Tue 17 Nov	23–47	Good	0:00	2.9	1 Low

Common questions about the air in Lyon

Is the air in Lyon safe today?
Yes. Right now the US AQI in Lyon is 40, which counts as good. Great air. A perfect time to be outside. It is expected to reach 70 (moderate) around Sat 12:00.
When is the best time to be outside in Lyon?
Sat 15:00–18:00. That is the cleanest stretch in the next 24 hours, with the US AQI averaging about 42. The worst hour is around Sat 12:00, at 70.
What is the main pollutant in Lyon?
Fine particles (PM_2.5). It drives the index right now, at 7.2 µg/m³. Tiny particles from combustion, fires and dust that reach deep into the lungs. The main driver of AQI worldwide.
How does Lyon's air compare with the WHO guideline?
Within the guideline. Over the next 24 hours PM_2.5 averages about 12 µg/m³, against the World Health Organization's 24-hour guideline of 15 µg/m³. The other pollutants stay within their guideline levels.
How many cigarettes is a day of Lyon's air?
About 0.6 cigarettes. Over the next 24 hours PM_2.5 averages about 12 µg/m³. By Berkeley Earth's rule of thumb, 22 µg/m³ breathed for a day is roughly one cigarette.
Will air quality in Lyon improve this week?
Sunday looks cleanest. Its AQI peaks at 30, against 70 on Saturday, the worst day in the forecast.

Measured near Lyon

Station and measurements	Distance	US AQI	Level
Unnamed sensor Sensor.Community, low-cost sensor PM_2.5: 1.7 µg/m³ · Fri 18:38 PM₁₀: 4.7 µg/m³ · Fri 18:38	1.5 km	9	Good
LYON Centre OpenAQ, reference monitor PM₁₀: 8.9 µg/m³ · Fri 16:00 O₃: 49 µg/m³ · Fri 16:00	1.6 km	23	Good
LYON TRAFIC JAURES OpenAQ, reference monitor NO₂: 11 µg/m³ · Fri 16:00	1.7 km	6	Good

Air quality near Lyon

US AQI right now. Cleanest nearby: Frankfurt (44); worst: Milan (61). The tick on each bar is Lyon, at 40.

Marseille 278 km S 46 Good
Zurich 335 km NE 46 Good
Milan 340 km E 61 Moderate
Paris 391 km NW 55 Moderate
Barcelona 532 km SW 45 Good
Frankfurt 562 km NE 44 Good

All 162 cities →

About this forecast

Forecast from CAMS Europe and global via Open-Meteo: the Copernicus Atmosphere Monitoring Service (CAMS) model at about 40 km resolution (about 10 km inside Europe). Global runs update every 12 hours and European runs every 24 hours. Models smooth out street-level peaks, so busy roads and industrial sites can be worse than shown. Nearby station measurements are independent observations, not adjustments to the forecast. The point forecast uses Open-Meteo’s CAMS products, including a separate carbon monoxide product; it can differ from the globe’s global grid. The AQI rates each hour on the US EPA scale, the same way the map colors it; official daily figures average over 24 hours (8 for ozone), so they can read lower after a short peak. Readings for 45.76°N, 4.84°E, valid 2026-11-13 17:00 UTC.