Outdoor
Current values look suitable for ordinary outdoor activity for most people.
Why: Low AQI and low pollutant levels support this guidance.
London, United Kingdom
London air quality today
Current values look suitable for ordinary outdoor activity for most people.
Data: Current Open-Meteo model estimate
Practical guidance
Running
Current values look suitable for an easy outdoor run.
Why: Low AQI and low pollutant levels support this guidance.
Ventilation
Current values support brief ventilation.
Why: Low AQI and low pollutant levels support brief ventilation.
Air quality and outdoor metrics
European AQI
Air Quality Index
23
Fair
PM2.5
Fine particulate matter
4.0µg/m³
Low
PM10
Coarse particulate matter
7.6µg/m³
Low
NO₂
Nitrogen dioxide
12µg/m³
Low
O₃
Ozone
65µg/m³
Moderate
UV index
Sun exposure level
1
Low
Pollen
Pollen availability
Low
Temperature
Air temperature
24°C
Warm
Feels like
Apparent temperature
25°C
Warm
Wind
Wind speed
15km/h
Breezy
Humidity
Relative humidity
65%
Comfortable
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Disclaimer
This information is a general estimate only and is not medical advice.
Location
London, United Kingdom
Coordinates: 51.5074, -0.1278 · Europe/London
Interpret AQI for outdoor activity
Calculic's European AQI calculator assesses the value using your population group and planned activity intensity.
Interpret AQI in CalculicThis page's European AQI value, city and timestamp are passed to the calculator through the link.
What affects air quality in London
The Greater London Authority's LAEI 2022 treats road transport as a quantified Greater London emissions source, with NOx, PM10 and PM2.5 estimates split by vehicle type.
This is Greater London emissions-inventory context, not a statement about today's conditions or the provenance of this page's current AQI and pollen data.
Local monitoring and context
London boroughs use nitrogen-dioxide diffusion tubes for monthly passive measurements that supplement the reference-analyser network across London.
The diffusion tubes and reference analysers are local monitoring context; they do not identify the source of this page's current AQI or pollen values.
City air quality FAQ
How should I read the AQI for London?
European AQI condenses air quality into one value. On this page, it helps you quickly judge whether conditions look good, moderate or more polluted than usual.
Is the air quality good for going outside?
Check the outdoor and running cards first. They combine AQI, particles, ozone, weather and other factors that can affect outdoor comfort.
Should I ventilate right now?
The ventilation card considers AQI and pollutants such as particles, nitrogen dioxide and ozone. If values are elevated, a shorter opening or a later moment may be better.
Why can air quality change during the day?
Weather, emissions, ozone formation, particles and air flow can shift local conditions, so the next hours can differ from the current reading.
Sources and methodology
Current data
This page uses European AQI.
Current and hourly air-quality values are CAMS-based model estimates, not measurements from a local monitoring station. They may not reflect street-level conditions.
- Displayed state
- Current model estimate
- Data time
- 4 Sept 2026, 16:00
- Data source
- Open-Meteo
Evergreen city statements
Each local statement is linked to a checked primary-authority source. A source check is editorial provenance and does not describe current-data freshness.
Local sources support the background claims below; they are not the source of the current data shown above unless explicitly stated otherwise.
Authoritative sources for local statements
Air Quality Data
Greater London Authority
- Scope
- Greater London
- Source checked
- 22 Aug 2026
The LAEI section describes source-type and vehicle-type emissions estimates; the Diffusion Tube Data section explains borough tubes and the reference-analyser network.
Applicability: Greater London inventory and monitoring overview; it does not provide the current AQI or pollen values rendered by this page.
Based on this source: The Greater London Authority's LAEI 2022 treats road transport as a quantified Greater London emissions source, with NOx, PM10 and PM2.5 estimates split by vehicle type.
London boroughs use nitrogen-dioxide diffusion tubes for monthly passive measurements that supplement the reference-analyser network across London.