San Francisco del Rincón Air Quality Forecast - Today, Tomorrow
Air Quality Today
Today (14 October): Air quality in San Francisco del Rincón is very poor. AQI and PM10 are very poor; PM2.5 is poor; PM1 is fair; NO2, O3, SO2, CO, and HCHO are good. Pollution peaks around 6:00 PM (PM2.5: 100/100).
Air Quality Tomorrow
Tomorrow (15 October 2026): Air quality in San Francisco del Rincón is poor. AQI improves to poor; PM2.5 decreases to moderate; PM10 decreases to poor; PM1 decreases to good; all other pollutants stay as today. Pollution peaks around 12:00 AM (PM10: 100/100).
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Air Quality
Today - 14 October
| Pollutant | Level | Value |
|---|---|---|
| AQI | Very poor | 89.4/100 |
| PM2.5 (fine particles) | Poor | 68.9/100 |
| PM10 (coarse particles) | Very poor | 89.4/100 |
| NO2 (nitrogen dioxide) | Good | 0.4/100 |
| O3 (ozone) | Good | 9.1/100 |
| SO2 (sulfur dioxide) | Good | 0.2/100 |
| CO (carbon monoxide) | Good | 0.4/100 |
| HCHO (formaldehyde) | Good | 0.7/100 |
| PM1 (ultrafine particles) | Fair | 23.4/100 |
Tomorrow - 15 October
| Pollutant | Level | Value |
|---|---|---|
| AQI | Poor | 67.7/100 |
| PM2.5 (fine particles) | Moderate | 52.3/100 |
| PM10 (coarse particles) | Poor | 67.7/100 |
| NO2 (nitrogen dioxide) | Good | 0.2/100 |
| O3 (ozone) | Good | 9.7/100 |
| SO2 (sulfur dioxide) | Good | 0.1/100 |
| CO (carbon monoxide) | Good | 0.4/100 |
| HCHO (formaldehyde) | Good | 0.8/100 |
| PM1 (ultrafine particles) | Good | 18.7/100 |
Local Environmental Conditions
Around the center of San Francisco del Rincón, dense development means road traffic is the main local source of nitrogen dioxide and fine particles. At around 1,760 m above sea level, the air is generally well mixed, though calm, cold nights can trap smoke near the ground. Manufacturing adds to local emissions. On some days, pollution drifting in from farther away outweighs local sources.
From December to February, cooler nights and lighter winds, with temperatures around 14°C, let traffic pollution linger near busy roads. Summer sun from April to August cooks traffic fumes into ozone, especially in the warmest month, which averages 24°C. From one day to the next, still, dry weather allows pollution to accumulate, and wind or rain clears it out.
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Frequently Asked Questions About Air Quality in Guanajuato
Is air quality bad in San Francisco del Rincón right now?
On 14 October 2026, overall air quality in San Francisco del Rincón is very poor. AQI is the main air quality indicator at 89.4/100. Pollution peaks around 6:00 PM (PM2.5: 100/100).
Will air quality be worse tomorrow in San Francisco del Rincón?
On 15 October 2026, air quality conditions in San Francisco del Rincón will be better than today, with AQI forecast at poor at 67.7/100. Pollution peaks around 12:00 AM (PM10: 100/100).
When is air pollution at its worst in San Francisco del Rincón?
From December to February, cooler nights and lighter winds, with temperatures around 14°C, let traffic pollution linger near busy roads. Summer sun from April to August cooks traffic fumes into ozone, especially in the warmest month, which averages 24°C. From one day to the next, still, dry weather allows pollution to accumulate, and wind or rain clears it out.
Are air quality levels in San Francisco del Rincón based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
Understanding the Scale
The 0–100 air quality scores represent risk levels, not direct air pollutant concentrations. Higher scores indicate higher risk.
Air Quality
| Good | 0-20 | Low air quality risk. Air quality is expected to be good, with low levels of pollution. |
| Fair | 20-40 | Generally low air quality risk. Air quality is expected to be acceptable, with some pollution present. |
| Moderate | 40-60 | Moderate air quality risk. Air pollution is elevated and air quality may be less favorable. |
| Poor | 60-80 | High air quality risk. Air pollution is high and air quality is expected to be poor. |
| Very Poor | 80-100 | Very high air quality risk. Air pollution is very high and air quality is expected to be very poor. |