Air Quality in León Today — Live AQI, PM2.5 & PM10, Smog, Weather and Forecast

The latest data Last 7 days León pollution March 2016 - May 2020
Latest air quality data: León
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Pollution and air quality forecast for León. Today is Thursday, August 27, 2026. The following air pollution values have been recorded for León:
  1. particulate matter (PM2.5) dust - 6 (Good)
  2. particulate matter (PM10) suspended dust - 8 (Good)
  3. ozone (O3) - 75 (Moderate)
  4. nitrogen dioxide (NO2) - 3 (Good)
  5. sulfur dioxide (SO2) - 2 (Good)
  6. carbon monoxide (CO) - 242 (Good)
Real-time Air Quality Index (AQI) for León, Wednesday, August 26, 2026: 2.

air quality index: 1
AQI 2 Moderate

What is the air quality in León today? Is the air polluted in León?. Is there smog?

Today (Wednesday, August 26, 2026) air quality is moderate in León. Some pollutants in León may slightly affect very few hypersensitive individuals. Air pollutants in León may cause minor breathing discomfort to sensitive people.


What is the current level of PM2.5 in León? (particulate matter (PM2.5) dust)
Today's PM2.5 level is: 6 (Good) For comparison, the highest level of PM2.5 in León in the last 7 days was: 10 (Sunday, August 23, 2026) and the lowest: 5 (Thursday, August 20, 2026). The highest PM2.5 values were recorded: 44 (April 2016). The lowest level of particulate matter PM2.5 pollution occurs in month: October (12).

What is the level of PM10 today in León? (particulate matter (PM10) suspended dust)
The current level of particulate matter PM10 in León is: 8 (Good) The highest PM10 values usually occur in month: 89 (January 2017). The lowest value of particulate matter PM10 pollution in León is usually recorded in: May (29).

How is the O3 level today in León? (ozone (O3))
75 (Moderate)

How high is the level of NO2? (nitrogen dioxide (NO2))
3 (Good)

What is the level of SO2 pollution? (sulfur dioxide (SO2))
2 (Good)

How high is the CO level? (carbon monoxide (CO))
242 (Good)



Current data Wednesday, August 26, 2026 at 7:00 PM

PM2,5 6 (Good)

PM10 8 (Good)

O3 75 (Moderate)

NO2 3 (Good)

SO2 2 (Good)

CO 242 (Good)

Data on air pollution from recent days in León

index 2026-08-26 2026-08-25 2026-08-24 2026-08-23 2026-08-22 2026-08-21 2026-08-20 2026-08-19
pm25 9
Good		 9
Good		 8
Good		 10
Good		 9
Good		 9
Good		 5
Good		 9
Good
pm10 12
Good		 10
Good		 9
Good		 12
Good		 11
Good		 11
Good		 5
Good		 11
Good
o3 58
Good		 61
Good		 65
Good		 71
Moderate		 67
Good		 64
Good		 63
Good		 77
Moderate
no2 9
Good		 9
Good		 8
Good		 7
Good		 7
Good		 7
Good		 6
Good		 7
Good
so2 2
Good		 3
Good		 2
Good		 3
Good		 3
Good		 3
Good		 2
Good		 4
Good
co 281
Good		 285
Good		 245
Good		 220
Good		 204
Good		 220
Good		 194
Good		 187
Good
data source »
Air pollution in León from March 2016 to May 2020
pollution pm25 hikersbay.com
index 2020-05 2020-04 2020-03 2020-02 2020-01 2019-12 2019-11 2019-10 2019-09 2019-08 2019-07 2019-06 2019-05 2019-04 2019-03 2019-02 2019-01 2018-12 2018-11 2018-10 2018-09 2018-08 2018-07 2018-06 2018-05 2018-04 2018-03 2018-02 2018-01 2017-12 2017-11 2017-10 2017-09 2017-08 2017-07 2017-06 2017-05 2017-04 2017-03 2017-02 2017-01 2016-12 2016-11 2016-10 2016-09 2016-08 2016-07 2016-06 2016-05 2016-04 2016-03
o3:ppm 0.04 (Good) 0.04 (Good) 0.03 (Good) 0.02 (Good) 0.02 (Good) 0.02 (Good) 0.02 (Good) 0.02 (Good) 0.03 (Good) 0.03 (Good) 0.03 (Good) 0.04 (Good) 0.04 (Good) 0.04 (Good) 0.03 (Good) 0.02 (Good) 0.02 (Good) 0.02 (Good) 0.02 (Good) 0.02 (Good) 0.02 (Good) 0.03 (Good) 0.03 (Good) 0.03 (Good) 0.04 (Good) 0.03 (Good) 0.03 (Good) 0.02 (Good) 0.02 (Good) 0.02 (Good) 0.03 (Good) 0.02 (Good) 0.02 (Good) 0.03 (Good) 0.03 (Good) 0.04 (Good) 0.04 (Good) 0.04 (Good) 0.04 (Good) 0.03 (Good) 0.03 (Good) 0.02 (Good) 0.02 (Good) 0.03 (Good) 0.03 (Good) 0.03 (Good) 0.04 (Good) 0.04 (Good) 0.04 (Good) 0.04 (Good) 0.03 (Good)
pm10 29 (Moderate) 40 (Moderate) 45 (Moderate) 40 (Moderate) 41 (Moderate) 48 (Moderate) 33 (Moderate) 31 (Moderate) 30 (Moderate) 34 (Moderate) 38 (Moderate) 38 (Moderate) 64 (Unhealthy for Sensitive Groups) 63 (Unhealthy for Sensitive Groups) 63 (Unhealthy for Sensitive Groups) 59 (Unhealthy for Sensitive Groups) 58 (Unhealthy for Sensitive Groups) 66 (Unhealthy for Sensitive Groups) 51 (Unhealthy for Sensitive Groups) 37 (Moderate) 41 (Moderate) 35 (Moderate) 54 (Unhealthy for Sensitive Groups) 38 (Moderate) 57 (Unhealthy for Sensitive Groups) 66 (Unhealthy for Sensitive Groups) 67 (Unhealthy for Sensitive Groups) 57 (Unhealthy for Sensitive Groups) 72 (Unhealthy for Sensitive Groups) 88 (Unhealthy) 69 (Unhealthy for Sensitive Groups) 50 (Moderate) 43 (Moderate) 44 (Moderate) 44 (Moderate) 53 (Unhealthy for Sensitive Groups) 86 (Unhealthy) 71 (Unhealthy for Sensitive Groups) 66 (Unhealthy for Sensitive Groups) 77 (Unhealthy for Sensitive Groups) 89 (Unhealthy) 79 (Unhealthy for Sensitive Groups) 57 (Unhealthy for Sensitive Groups) 52 (Unhealthy for Sensitive Groups) 48 (Moderate) 39 (Moderate) 40 (Moderate) 37 (Moderate) 73 (Unhealthy for Sensitive Groups) 74 (Unhealthy for Sensitive Groups) 63 (Unhealthy for Sensitive Groups)
so2:ppm 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) - (Good) 0.01 (Good) 0.01 (Good) 0.02 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0 (Good) 0 (Good) 0 (Good) 0 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good)
pm25 - (Good) - (Good) 23 (Moderate) 17 (Moderate) 27 (Moderate) 22 (Moderate) 18 (Moderate) 15 (Moderate) 16 (Moderate) 21 (Moderate) 20 (Moderate) 19 (Moderate) 30 (Moderate) 26 (Moderate) 22 (Moderate) 18 (Moderate) 19 (Moderate) 22 (Moderate) 18 (Moderate) 12 (Good) - (Good) 23 (Moderate) 27 (Moderate) 17 (Moderate) 24 (Moderate) 24 (Moderate) 21 (Moderate) 18 (Moderate) 18 (Moderate) 31 (Moderate) - (Good) 23 (Moderate) - (Good) 15 (Moderate) - (Good) 23 (Moderate) 43 (Unhealthy for Sensitive Groups) 30 (Moderate) 21 (Moderate) 26 (Moderate) 38 (Unhealthy for Sensitive Groups) 30 (Moderate) 17 (Moderate) 14 (Moderate) 20 (Moderate) 19 (Moderate) 38 (Unhealthy for Sensitive Groups) 31 (Moderate) 38 (Unhealthy for Sensitive Groups) 44 (Unhealthy for Sensitive Groups) 30 (Moderate)
co:ppm - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) - (Good) 0.87 (Good) - (Good) 1.2 (Good) 1.2 (Good) 1 (Good) 1.3 (Good) 1.4 (Good) 0.67 (Good) 0.46 (Good) 0.48 (Good) - (Good) 2.2 (Good) 0.77 (Good) 1.1 (Good) 1.4 (Good) 1.2 (Good) 0.96 (Good) 1.1 (Good) 1.2 (Good) 0.81 (Good) 0.65 (Good) 0.72 (Good) 0.68 (Good) 1.4 (Good) 0.91 (Good) 1.1 (Good) 0.96 (Good) 0.82 (Good) 0.96 (Good) 1.1 (Good) 1.1 (Good) 1.1 (Good) 0.96 (Good) 0.61 (Good) 0.76 (Good) 0.79 (Good) 0.61 (Good) 0.66 (Good) 1.1 (Good) 0.92 (Good)
data source »

León

Wednesday, August 26, 2026 at 7:00 PM

PM2,5 5.6 (Good)

particulate matter (PM2.5) dust

PM10 7.5 (Good)

particulate matter (PM10) suspended dust

O3 75 (Moderate)

ozone (O3)

NO2 3.4 (Good)

nitrogen dioxide (NO2)

SO2 1.6 (Good)

sulfur dioxide (SO2)

CO 242 (Good)

carbon monoxide (CO)

León

index 2026-08-19 2026-08-20 2026-08-21 2026-08-22 2026-08-23 2026-08-24 2026-08-25 2026-08-26
pm25 8.7 4.5 9.1 9.1 10 7.5 9 9.2
pm10 11 5.4 11 11 12 8.9 10 12
o3 77 63 64 67 71 65 61 58
no2 7.2 5.7 7.1 6.5 7 7.7 9.2 8.9
so2 3.6 1.9 3 3.1 2.7 1.9 3.4 2.3
co 187 194 220 204 220 245 285 281

Estación CICEG

index 2020-05 2020-04 2020-03 2020-02 2020-01 2019-12 2019-11 2019-10 2019-09 2019-08 2019-07 2019-06 2019-05 2019-04 2019-03 2019-02 2019-01 2018-12 2018-11 2018-10 2018-09 2018-08 2018-07 2018-06 2018-05 2018-04 2018-03 2018-02 2018-01 2017-12 2017-11 2017-10 2017-09 2017-08 2017-07 2017-06
co:ppm - - - - - - - - - - - 0.87 - 1.2 1.2 1 1.3 1.4 0.67 0.46 0.48 - 0.5 0.53 - 2.5 2 1.6 1.6 2.1 - - - 0.18 1.8 1.1
pm10 29 42 47 46 47 55 44 39 34 41 51 40 63 62 64 62 67 79 60 37 39 35 47 32 54 62 64 65 74 87 63 48 44 43 43 50
o3:ppm 0.05 0.04 0.03 0.02 0.02 0.02 0.02 0.02 0.03 0.03 0.04 0.03 0.04 0.04 0.03 0.02 0.02 0.02 0.02 0.02 0.02 0.03 0.03 0.03 0.04 0.04 0.03 0.03 0.02 0.01 0.03 0.03 0.03 0.03 0.03 0.04

Estación Facultad de

2017-06   2020-05
pollution pm25 hikersbay.com
index 2020-05 2020-04 2020-03 2020-02 2020-01 2019-12 2019-11 2019-10 2019-09 2019-08 2019-07 2019-06 2019-05 2019-04 2019-03 2019-02 2019-01 2018-12 2018-11 2018-10 2018-09 2018-08 2018-07 2018-06 2018-05 2018-04 2018-03 2018-02 2018-01 2017-12 2017-11 2017-10 2017-09 2017-08 2017-07 2017-06
o3:ppm 0.04 0.04 0.03 0.02 0.02 0.02 0.02 0.02 0.03 0.03 0.04 0.04 0.05 0.05 0.03 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.03 0.02 0.03 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.03 0.04
pm25 - - 23 17 27 22 18 15 16 21 20 19 30 26 22 18 19 22 18 12 - 23 27 17 24 24 21 18 18 31 - 23 - 15 - 23
co:ppm - - - - - - - - - - - - - - - - - - - - - - 1.1 0.87 1.4 1.3 1.2 0.51 1.1 0.86 0.81 0.65 0.72 1.7 1.6 1.4
so2:ppm 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 - - - - - - - 0.01 - 0.01
pm10 24 35 39 34 30 38 25 23 24 26 32 45 71 67 66 59 54 60 49 45 53 - 70 52 70 85 81 62 83 105 84 61 51 52 54 66

Estación T21

index 2020-05 2020-04 2020-03 2020-02 2020-01 2019-12 2019-11 2019-10 2019-09 2019-08 2019-07 2019-06 2019-05 2019-04 2019-03 2019-02 2019-01 2018-12 2018-11 2018-10 2018-09 2018-08 2018-07 2018-06 2018-05 2018-04 2018-03 2018-02 2018-01 2017-12 2017-11 2017-10 2017-09 2017-08 2017-07 2017-06
so2:ppm 0.01 0.01 0.01 0 0.01 0.01 0.01 0.01 0.01 - - 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0 - - 0.01 0.01 0.02 0.01 0.01 0.01 0.01 0.01 0.01
co:ppm - - - - - - - - - - - - - - - - - - - - - - 5.1 0.91 0.81 0.45 0.49 0.79 0.74 0.68 - - - 0.2 0.89 0.24
pm10 35 43 49 39 45 50 30 31 30 35 33 30 58 61 58 55 54 60 46 30 32 35 43 29 47 52 54 44 57 72 59 39 35 37 36 44
o3:ppm 0.04 0.04 0.03 0.02 0.02 0.02 0.02 0.02 0.03 0.02 0.03 0.04 0.04 0.04 0.03 0.02 0.02 0.02 0.02 0.02 0.03 0.03 0.03 0.03 - 0.04 - - 0.02 - - 0.02 0.02 0.02 - -

Estaci�n CICEG

index 2017-05 2017-04 2017-03 2017-02 2017-01 2016-12 2016-11 2016-10 2016-09 2016-08 2016-07 2016-06 2016-05 2016-04 2016-03
o3:ppm 0.04 0.04 0.03 0.03 - 0.03 0.02 0.03 0.03 0.03 0.04 0.04 0.04 0.04 0.03
pm10 82 71 65 76 94 91 62 58 52 40 41 50 95 97 78
co:ppm 1.2 0.93 0.85 1 1.2 1.2 1.2 0.99 0.76 - - 0.48 0.68 1.4 1.4

Estaci�n Facultad de

2016-03   2017-05
pollution pm25 hikersbay.com
index 2017-05 2017-04 2017-03 2017-02 2017-01 2016-12 2016-11 2016-10 2016-09 2016-08 2016-07 2016-06 2016-05 2016-04 2016-03
o3:ppm 0.04 0.04 0.04 0.03 0.03 0.02 0.02 0.02 0.03 0.03 0.04 0.04 0.03 0.04 0.03
so2:ppm 0.01 0.01 0.01 0.01 0.01 0.01 0 0 0 0 0.01 0.01 0.01 0.01 0.01
pm25 43 30 21 26 38 30 17 14 20 19 38 31 38 44 30
pm10 101 80 75 83 93 82 65 56 54 47 37 30 75 72 44
co:ppm 1.5 1.4 1.2 1 1.2 1.2 1.1 0.93 0.88 1.1 1 1 0.91 1.2 0.76

Estaci�n T21

index 2017-05 2017-04 2017-03 2017-02 2017-01 2016-12 2016-11 2016-10 2016-09 2016-08 2016-07 2016-06 2016-05 2016-04 2016-03
co:ppm 0.57 0.6 0.41 0.82 0.88 0.97 0.91 - 0.19 0.4 0.54 0.3 0.39 0.63 0.61
o3:ppm 0.05 0.04 0.04 0.03 0.03 0.02 0.02 0.03 0.03 0.03 0.03 0.04 0.04 0.04 0.03
so2:ppm 0.01 0.01 0.01 0.01 0.01 0.01 - - - - - 0.02 0.02 0.02 0.02
pm10 75 62 58 73 79 65 45 42 37 31 40 30 50 53 68

* Pollution data source: https://openaq.org (AirNow) The data is licensed under CC-By 4.0

🌦️ Weather · 16-day Forecast — León

🌦️ WEATHER · 16-DAY FORECASTLeón☁️31°CloudyToday · ↑32° ↓24°💨 4 km/h · 💧 54%Mon24.08☁️32°24°Tue25.08☁️32°24°Wed26.08☁️34°24°Thu27.08☁️36°24°Fri28.08🌤️39°27°Sat29.08🌧️32°25°Sun30.08🌧️32°25°Mon31.08🌧️37°24°Tue1.09🌤️36°23°Wed2.09🌧️36°24°Thu3.09🌧️35°24°Fri4.09🌧️32°23°Sat5.09🌧️35°24°Sun6.09🌧️29°24°Mon7.09🌧️32°24°Tue8.09🌧️33°24°pollution-alert.com · August 27, 2026

16-day weather forecast for León: today around 32°C (cloudy), lows near 24°C. Daily temperature and conditions, updated every day. A moderate breeze (about 14 km/h) is partially dispersing pollutants today.

☀️ UV Index · 16-day Forecast — León

☀️ UV INDEX · 16-DAY FORECASTLeón03681111+6.5UV HIGHtoday, day maxSPF 30-50, hat and sunglasses are a must. Better tostay in the shade 11:00-15:00.⏱ Unprotected fair skin can burn in about 30 min7Wed26.088Thu27.089Fri28.085Sat29.089Sun30.088Mon31.088Tue1.099Wed2.099Thu3.099Fri4.098Sat5.097Sun6.099Mon7.099Tue8.098Wed9.097Thu10.090-2 low3-5 moderate6-7 high8-10 very high11+ extremepollution-alert.com · August 27, 2026

The UV index in León today is 6.5 (high) — unprotected fair skin can burn in about 30 minutes.

📍 Air quality in nearby cities

Live PM2.5 around León — compare nearby locations.

Frequently asked questions

Is the air safe to breathe in León today?
The current average PM2.5 across León is about 6 µg/m³, rated “Good”. Air quality is good — outdoor activities are fine for everyone.
What is the current PM2.5 level in León?
Right now PM2.5 in León averages about 6 µg/m³ (“Good”). PM2.5 are fine particles small enough to reach the lungs and bloodstream.
Which day last week had the worst air in León?
Over the past week, the highest daily PM2.5 in León was recorded on Sunday, August 23 (about 10 µg/m³).
What is the UV index in León today?
The UV index in León today is 6.5 (high) — unprotected fair skin can burn in about 30 minutes.
Does today's wind help disperse smog in León?
A moderate breeze (about 14 km/h) is partially dispersing pollutants today.
How is air quality measured?
Air quality here is based on PM2.5 — the concentration of fine particulate matter in µg/m³. Lower values mean cleaner air. Data is updated daily from Open-Meteo.