Worst air pollution Buda Castle - Budapest, today and tomorrow
Today (20 September): Air quality in Buda Castle is moderate. AQI, PM2.5, and NO2 are moderate; O3, HCHO, and PM1 are fair; PM10, SO2, and CO are good. Pollution peaks around 8:00 AM (PM2.5: 40.8/100).
Tomorrow (21 September 2026): Air quality in Buda Castle is good. AQI improves to good; PM2.5 decreases to good; NO2 decreases to good; O3 decreases to good; HCHO decreases to good; PM1 decreases to good; all other pollutants stay as today. Pollution peaks around 12:00 AM (O3: 15.6/100). Airmine updates local air quality forecasts four times daily.
Get the full experience in the Airmine app.
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Follow your pollen exposure and performance with the free Airmine–Strava integration. See your pollen and air quality exposure for every Strava activity.
Buda Castle's air quality, as part of Budapest, is shaped by vehicle traffic and visitor footfall around the landmark, layered on top of the wider Budapest pattern. Local conditions here can differ somewhat from other parts of the city depending on traffic flow and building density.
Today - 20 September | Pollution peaks at 08:00
AQI:
Moderate
40.8/100
PM2.5 (fine particles):
Moderate
40.8/100
PM10 (coarse particles):
Good
19.2/100
NO2 (nitrogen dioxide):
Moderate
40.4/100
O3 (ozone):
Fair
21.4/100
SO2 (sulfur dioxide):
Good
1.2/100
CO (carbon monoxide):
Good
0.9/100
HCHO (formaldehyde):
Fair
20.8/100
PM1 (ultrafine particles):
Fair
26.3/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 00:00
AQI:
Good
15.6/100
PM2.5 (fine particles):
Good
13.0/100
PM10 (coarse particles):
Good
7.4/100
NO2 (nitrogen dioxide):
Good
8.1/100
O3 (ozone):
Good
15.6/100
SO2 (sulfur dioxide):
Good
0.9/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
4.2/100
PM1 (ultrafine particles):
Good
5.0/100
Other Landmarks in Budapest
Sports venues in Budapest
Frequently Asked Questions
Is air quality bad in Buda Castle right now?
On 20 September 2026, overall air quality in Buda Castle is moderate. AQI is the main air quality indicator at 40.8/100. Pollution peaks around 8:00 AM (PM2.5: 40.8/100).
Will air quality be worse tomorrow in Buda Castle?
On 21 September 2026, air quality conditions in Buda Castle will be better than today, with AQI forecast at good at 15.6/100. Pollution peaks around 12:00 AM (O3: 15.6/100).
When is air pollution at its worst in Buda Castle?
People in Buda Castle tend to notice worse air when birch and hornbeam pollen is high or because of vehicle traffic and visitor footfall around the landmark, following the same pattern as Budapest overall; clearer conditions usually return once the weather shifts.
Are air quality levels in Buda Castle 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.
Want to see air quality forecasts for other cities in Hungary?
Check air quality in other popular cities:
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.
Get the full experience in the Airmine app.