Worst air pollution Veterans Museum - Yountville, today and tomorrow
Today (20 September): Air quality in Veterans Museum is fair. AQI, PM2.5, and O3 are fair; PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 9:00 AM (PM2.5: 31.0/100).
Tomorrow (21 September 2026): Air quality in Veterans Museum is fair. PM10 increases to fair; NO2 increases to fair; all other pollutants stay as today. Pollution peaks around 10:00 AM (PM2.5: 39.0/100). Airmine updates local air quality forecasts four times daily.
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In Veterans Museum, with less congestion here, dust from surrounding fields and occasional burning plays a bigger role than traffic. Trees and green space nearby provide a partial buffer, catching particulate matter before it spreads further. Actual daily readings vary with weather, time of day, and short-term local activity. The surrounding area tends to follow a similar pattern, with only minor local variation.
Today - 20 September | Pollution peaks at 09:00
AQI:
Fair
31.0/100
PM2.5 (fine particles):
Fair
31.0/100
PM10 (coarse particles):
Good
17.8/100
NO2 (nitrogen dioxide):
Good
11.4/100
O3 (ozone):
Fair
29.0/100
SO2 (sulfur dioxide):
Good
1.0/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
2.0/100
PM1 (ultrafine particles):
Good
8.4/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 10:00
AQI:
Fair
39.0/100
PM2.5 (fine particles):
Fair
39.0/100
PM10 (coarse particles):
Fair
22.0/100
NO2 (nitrogen dioxide):
Fair
20.7/100
O3 (ozone):
Fair
32.9/100
SO2 (sulfur dioxide):
Good
1.1/100
CO (carbon monoxide):
Good
0.5/100
HCHO (formaldehyde):
Good
2.0/100
PM1 (ultrafine particles):
Good
11.7/100
Other Landmarks in Yountville
Frequently Asked Questions
Is air quality bad in Veterans Museum right now?
On 20 September 2026, overall air quality in Veterans Museum is fair. AQI is the main air quality indicator at 31.0/100. Pollution peaks around 9:00 AM (PM2.5: 31.0/100).
Will air quality be worse tomorrow in Veterans Museum?
On 21 September 2026, air quality conditions in Veterans Museum will be similar to today, with AQI forecast at fair at 39.0/100. Pollution peaks around 10:00 AM (PM2.5: 39.0/100).
When is air pollution at its worst in Veterans Museum?
From November to January, average wind speeds run around 10 km/h with temperatures near 9°C, calm and cool enough to let particulate matter and smoke build up near the ground rather than disperse. From June to August, temperatures average around 22°C, warm enough for strong sun and heat to drive ground-level ozone formation.
Are air quality levels in Veterans 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.
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Data provided by Airmine — Last update: 20 September 2026 at 14:33 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
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