Rancho de Guadalupe Historical Society Museum, Guadalupe Air Quality Forecast - Today, Tomorrow
Air Quality Today
Today (10 October): Air quality in Rancho de Guadalupe Historical Society Museum is fair. AQI, PM2.5, PM10, NO2, and O3 are fair; SO2, CO, HCHO, and PM1 are good. Pollution peaks around 3:00 AM (O3: 34.8/100).
Air Quality Tomorrow
Tomorrow (11 October 2026): Air quality in Rancho de Guadalupe Historical Society Museum is fair. All pollutants stay as today. Pollution peaks around 3:00 AM (O3: 37.6/100).
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Air Quality
Today - 10 October
| Pollutant | Level | Value |
|---|---|---|
| AQI | Fair | 34.8/100 |
| PM2.5 (fine particles) | Fair | 24.7/100 |
| PM10 (coarse particles) | Fair | 27.6/100 |
| NO2 (nitrogen dioxide) | Fair | 25.2/100 |
| O3 (ozone) | Fair | 34.8/100 |
| SO2 (sulfur dioxide) | Good | 1.1/100 |
| CO (carbon monoxide) | Good | 0.5/100 |
| HCHO (formaldehyde) | Good | 1.6/100 |
| PM1 (ultrafine particles) | Good | 6.7/100 |
Tomorrow - 11 October
| Pollutant | Level | Value |
|---|---|---|
| AQI | Fair | 37.6/100 |
| PM2.5 (fine particles) | Fair | 31.6/100 |
| PM10 (coarse particles) | Fair | 22.0/100 |
| NO2 (nitrogen dioxide) | Fair | 34.2/100 |
| O3 (ozone) | Fair | 37.6/100 |
| SO2 (sulfur dioxide) | Good | 2.0/100 |
| CO (carbon monoxide) | Good | 0.5/100 |
| HCHO (formaldehyde) | Good | 2.7/100 |
| PM1 (ultrafine particles) | Good | 11.5/100 |
Local Environmental Conditions
Around this site in Guadalupe, a mix of built-up land and open space means traffic is an important, but not overwhelming, local pollution source. The fields nearby contribute dust during field work, as well as ammonia from fertilizer and manure that helps form fine particles in the air. Air arriving from elsewhere in the region adds to what is produced locally.
From January to March, cooler nights and lighter winds, with temperatures around 12°C, let traffic pollution linger near busy roads. Summers are mild, averaging around 19°C in the warmest month, so ozone usually stays moderate even from June to October. Wildfire smoke is most likely from June to October, sometimes turning the sky hazy for days.
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Frequently Asked Questions About Air Quality in California
Is air quality bad in Rancho de Guadalupe Historical Society Museum right now?
On 10 October 2026, overall air quality in Rancho de Guadalupe Historical Society Museum is fair. AQI is the main air quality indicator at 34.8/100. Pollution peaks around 3:00 AM (O3: 34.8/100).
Will air quality be worse tomorrow in Rancho de Guadalupe Historical Society Museum?
On 11 October 2026, air quality conditions in Rancho de Guadalupe Historical Society Museum will be similar to today, with AQI forecast at fair at 37.6/100. Pollution peaks around 3:00 AM (O3: 37.6/100).
When is air pollution at its worst in Rancho de Guadalupe Historical Society Museum?
From January to March, cooler nights and lighter winds, with temperatures around 12°C, let traffic pollution linger near busy roads. Summers are mild, averaging around 19°C in the warmest month, so ozone usually stays moderate even from June to October. Wildfire smoke is most likely from June to October, sometimes turning the sky hazy for days.
Are air quality levels in Rancho de Guadalupe Historical Society Museum 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. |