City report · Guanajuato, Mexico
San Miguel de Allende Air quality today
Air quality in San Miguel de Allende currently reads AQI 46 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 46
Good
- PM2.5, fine particles (µg/m³)
- 8.9
- tree cover
- 17.8%
- trees in this area
- 55.9K
- more trees needed
- 38.3K
Measured across a 2 km radius around Zona Centro, San Miguel de Allende, Gto., Mexico (12.57 km²), from a satellite image of Sep 20, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
San Miguel de Allende · AQI 46 (Good)
San Miguel de Allende's tree count comes to 55,864 trees across 12.56 km² of land, 12 points below the 30% tree-cover level considered healthy for this area, so roughly 38,289 more trees would close the gap.
Air quality detail
Air quality in San Miguel de Allende today: AQI 46, Good
Main pollutant: PM2.5 · Observed Nov 10, 12:00 local time via Open-Meteo / CAMS, corrected with 6 ground-station cities within 225 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 6 station cities within 225 km, e.g. Santiago de Querétaro and Aguascalientes
Health signal
Air quality is satisfactory for everyone.
PM2.5
8.9
PM10
14.1
NO₂
2.3
O₃
104.0
SO₂
6.0
CO
152.0
- Outdoor exercise
- A good day to be active outside
- Windows
- Open them to air the house
- Mask
- Not needed
- Air purifier
- Not needed
Over the last 7 days, the CAMS air-quality model put San Miguel de Allende's daily AQI at 54 on average, from 38 on Nov 4 to an hourly peak of 82 on Nov 5.
Where San Miguel de Allende stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in San Miguel de Allende: Critically low
17.8% tree cover against a 30% healthy-neighborhood target, across 12.56 km² of land.
Trees in this area
55,864
Target trees
94,153
More trees needed
38,289
CO₂ if planted / yr
842.4 t
Deforestation · 2001–2025
How much forest has San Miguel de Allende lost?
Since 2001, the area within 10 km of San Miguel de Allende has lost about 8 hectares of forest (about 11 football pitches): under 1% of the forest it had in 2000. The biggest cause was wildfires (29%), after which forest can grow back. About 3 hectares (35%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from March 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 8 haabout 11 football pitches
- Share of its forest
- under 1%of what there was in 2000
- Cleared for good
- 3 hadeforestation: turned into farms, mines or towns
The worst year was 2013, when about 2 hectares of forest were lost, mostly to wildfires.
Hectares of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | under 1 ha | under 1 ha | 1 ha |
| 2002 | under 1 ha | under 1 ha | under 1 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | under 1 ha | under 1 ha | 1 ha |
| 2005 | under 1 ha | under 1 ha | under 1 ha |
| 2006 | under 1 ha | under 1 ha | under 1 ha |
| 2007 | under 1 ha | under 1 ha | under 1 ha |
| 2008 | 1 ha | under 1 ha | 1 ha |
| 2009 | under 1 ha | under 1 ha | under 1 ha |
| 2010 | under 1 ha | under 1 ha | under 1 ha |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | under 1 ha | under 1 ha | under 1 ha |
| 2013 | under 1 ha | 2 ha | 2 ha |
| 2014 | under 1 ha | under 1 ha | under 1 ha |
| 2015 | under 1 ha | under 1 ha | under 1 ha |
| 2016 | under 1 ha | under 1 ha | under 1 ha |
| 2017 | under 1 ha | under 1 ha | under 1 ha |
| 2018 | under 1 ha | under 1 ha | under 1 ha |
| 2019 | under 1 ha | under 1 ha | under 1 ha |
| 2020 | under 1 ha | under 1 ha | under 1 ha |
| 2021 | under 1 ha | under 1 ha | under 1 ha |
| 2022 | under 1 ha | under 1 ha | under 1 ha |
| 2023 | under 1 ha | under 1 ha | under 1 ha |
| 2024 | under 1 ha | under 1 ha | under 1 ha |
| 2025 | under 1 ha | under 1 ha | under 1 ha |
What is causing deforestation around San Miguel de Allende?
- Wildfirescan grow back29% · 2 ha
- Towns and roadscleared for good21% · 2 ha
- Farms, pasture and plantationscleared for good15% · 1 ha
Also: storms, floods and other natural causes, unknown causes.
Causes for 2025 are estimates, based on what caused forest loss in the same places up to 2024.
Forest gained and lost, 2000–2020
- Forest in 2000
- 2,510 ha
- Forest in 2020
- 2,570 ha
- Overall change
- +57 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around San Miguel de Allende grew from about 2,510 hectares to 2,570 hectares, a net gain of about 57 hectares (+2.3%). New forest grew on about 75 hectares, while 19 hectares were lost.
These 2000 and 2020 maps, from the University of Maryland, count any land with trees taller than 5 m as forest, including plantations and orchards. Forest that was cut or burned and had grown back by 2020 counts in both years, so the loss here is smaller than the yearly figures.
These figures cover everything within 10 km of the city center, a wider area than the report above, because forest is usually lost at a city's edges.
Source: Hansen/UMD/Google/USGS/NASA, Global Forest Change (GFC-2025-v1.13); causes: WRI/Google DeepMind drivers of forest loss; both CC BY 4.0, summed by Airleaf for each area. Forest gained and lost 2000–2020: Potapov et al. 2022, UMD GLAD Global Land Cover and Land Use Change, CC BY 4.0. Images: contains modified Copernicus Sentinel data. How it's measured
In the same region
Measured cities near San Miguel de Allende
Same 2 km radius, same index — so they compare directly.
- Celaya44.4 km
Mexico
- Tree cover
- 7%
- Air quality
- 51
- Santiago de Querétaro51.9 km
Mexico
- Tree cover
- 9%
- Air quality
- 65
- Salamanca60.9 km
Mexico
- Tree cover
- 11%
- Air quality
- 78
- Irapuato69.2 km
Mexico
- Tree cover
- 5%
- Air quality
- 72
- San Juan del Río97.3 km
Mexico
- Tree cover
- 15%
- Air quality
- 48
- León de los Aldama100.1 km
Mexico
- Tree cover
- 4%
- Air quality
- 63
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Frequently asked
Questions about San Miguel de Allende
What is the air quality (AQI) in San Miguel de Allende right now?
The latest reading for San Miguel de Allende shows an AQI of 46 (Good), observed Nov 10, 12:00 local time via Open-Meteo / CAMS, corrected with 6 ground-station cities within 225 km, US EPA index. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in San Miguel de Allende today?
At AQI 46 (Good): a good day to be active outside. Windows: open them to air the house. Masks: not needed. The reading changes through the day, so check again before a long run or ride.
What has the air quality in San Miguel de Allende been like this week?
Over the last 7 days, the CAMS air-quality model put San Miguel de Allende's daily AQI at 54 on average, from 38 on Nov 4 to an hourly peak of 82 on Nov 5. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around San Miguel de Allende lost since 2001?
Since 2001, the area within 10 km of San Miguel de Allende has lost about 8 hectares of forest (about 11 football pitches): under 1% of the forest it had in 2000. The biggest cause was wildfires (29%), after which forest can grow back. About 3 hectares (35%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around San Miguel de Allende grew from about 2,510 hectares to 2,570 hectares, a net gain of about 57 hectares (+2.3%). New forest grew on about 75 hectares, while 19 hectares were lost.
What is the tree count in San Miguel de Allende?
San Miguel de Allende has an estimated 55,864 trees across the 12.56 km² of land measured — 17.8% tree cover, 12 percentage points short of the 30% tree-cover target set for this area.
How many more trees does San Miguel de Allende need?
San Miguel de Allende needs roughly 38,289 more trees to close a 12-point shortfall against its 30% tree-cover target — about 842.4 t of extra CO₂ absorbed per year once grown.
How are San Miguel de Allende's air quality and tree cover measured?
Air quality comes from ground monitoring stations via OpenAQ where one reports nearby, and otherwise, as here, from the Open-Meteo / CAMS model, which may differ from street-level monitors. Tree cover is measured from Sentinel-2 L2A (ESA Copernicus) via Earth Search satellite imagery at 10 m detail across a 2 km radius around Zona Centro; the tree count is an estimate derived from that cover.
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