Fine particles
13.4µg/m³Fair · 1 hourCAMS model • Open-Meteo
CardiffAir quality, PM2.5 and PM10
Check PM2.5 and PM10 particle levels alongside ozone, nitrogen dioxide and other gases. Compare the latest available concentrations with recent days and explore changes in air pollution through the available historical records.
Cardiff - latest available concentrations (November 11, 2026, 02:00 local time): PM2.5: 13.4 µg/m³, PM10: 15.5 µg/m³, O₃: 46 µg/m³, NO₂: 11.6 µg/m³, SO₂: 0.7 µg/m³, CO: 214 µg/m³. These are hourly CAMS model values for a point representing the city.
Air quality questions →
1 weather warning in effect for United Kingdom
Cardiff · Air pollutant concentrations
Data time: November 11, 2026 · 02:00 · local timeParticulate matter
15.5µg/m³Fair · 1 hourOzone
46µg/m³Good · 1 hourNitrogen dioxide
11.6µg/m³Fair · 1 hourSulphur dioxide
0.7µg/m³Good · 1 hourCarbon monoxide
214µg/m³PM2.5 vs PM10 - what is the difference? → · Models and monitoring stations →
DAILY DATA · Cardiff
Cardiff - air pollution over recent days (2026-08-31 - 2026-11-10)
Concentrations of all available pollutants for this city.
PM2.5Lowest 3.32 2026-08-31Highest 24.28 2026-11-072026-08-31 - 2026-11-10
PM10Lowest 6.69 2026-08-31Highest 27.64 2026-11-072026-08-31 - 2026-11-10
O₃Lowest 18.42 2026-11-07Highest 71.13 2026-09-062026-08-31 - 2026-11-10
NO₂Lowest 1.92 2026-09-03Highest 25.9 2026-11-072026-08-31 - 2026-11-10
SO₂Lowest 0.23 2026-09-03Highest 1.79 2026-11-062026-08-31 - 2026-11-10
COLowest 112.33 2026-09-03Highest 256.17 2026-11-072026-08-31 - 2026-11-10
Scroll the chart or table sideways to see the full period.
| Pollutant | 2026-11-10 | 2026-11-09 | 2026-11-08 | 2026-11-07 | 2026-11-06 | 2026-11-05 | 2026-11-04 | 2026-09-07 | 2026-09-06 | 2026-09-05 | 2026-09-04 | 2026-09-03 | 2026-09-02 | 2026-09-01 | 2026-08-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 | 17.7 | 21.66 | 19.4 | 24.28 | 19.25 | 8.37 | 6.34 | 4.63 | 5.48 | 4.83 | 3.56 | 4.39 | 3.55 | 3.51 | 3.32 |
| PM10 | 20.63 | 25.7 | 21.88 | 27.64 | 21.85 | 11.71 | 9.84 | 11 | 11.2 | 12.68 | 10.67 | 9.39 | 8.83 | 8.26 | 6.69 |
| O₃ | 41.13 | 31.71 | 34.88 | 18.42 | 25.79 | 46.42 | 52.58 | 67.21 | 71.13 | 63.5 | 57.42 | 51.33 | 63.38 | 64.92 | 61.96 |
| NO₂ | 15.53 | 19.48 | 15.95 | 25.9 | 19.15 | 9.74 | 7.63 | 3.06 | 4.77 | 5.24 | 2.93 | 1.92 | 2.77 | 5.45 | 3.87 |
| SO₂ | 1.06 | 1.03 | 1.16 | 1.66 | 1.79 | 0.99 | 0.72 | 0.47 | 0.48 | 1.09 | 0.59 | 0.23 | 0.26 | 0.92 | 0.81 |
| CO | 213.92 | 222.46 | 221.29 | 256.17 | 219.42 | 168.75 | 161.08 | 145.17 | 149.38 | 177.42 | 143.29 | 112.33 | 133.46 | 180.17 | 174 |
A dot on the chart and a dash in the table indicate missing data. The latest day may be incomplete.
AIR QUALITY ARCHIVE · Cardiff
Cardiff - air pollution history (2016-02 - 2020-05)
Compare monthly particle and gas concentrations in the available archive.
PM2.5Lowest 5.84 2016-07Highest 24.7 2019-022016-02 - 2020-05
PM10Lowest 13.1 2017-07Highest 34 2019-022016-02 - 2020-05
O₃Lowest 19.9 2016-12Highest 71.9 2020-042016-02 - 2020-05
NO₂Lowest 9.12 2020-04Highest 37.5 2019-112016-02 - 2020-05
SO₂Lowest 0.95 2018-02Highest 14.9 2017-052016-02 - 2020-05
Scroll the chart or table sideways to see the full period.
| Pollutant | 2020-05 | 2020-04 | 2020-03 | 2020-02 | 2020-01 | 2019-12 | 2019-11 | 2019-10 | 2019-09 | 2019-08 | 2019-07 | 2019-06 | 2019-05 | 2019-04 | 2019-03 | 2019-02 | 2019-01 | 2018-12 | 2018-11 | 2018-10 | 2018-09 | 2018-08 | 2018-07 | 2018-06 | 2018-05 | 2018-04 | 2018-03 | 2018-02 | 2018-01 | 2017-12 | 2017-11 | 2017-10 | 2017-09 | 2017-08 | 2017-07 | 2017-06 | 2017-05 | 2017-04 | 2017-03 | 2017-02 | 2017-01 | 2016-12 | 2016-11 | 2016-10 | 2016-09 | 2016-08 | 2016-07 | 2016-06 | 2016-05 | 2016-04 | 2016-03 | 2016-02 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 | 8.29 | 12.9 | 7.27 | 6 | 7.39 | 7.98 | 7.68 | 6.58 | 6.16 | 7.53 | 5.99 | 11.9 | 10.9 | 19.4 | 11.9 | 24.7 | 11.7 | 9.4 | 12.5 | 8.71 | 6.28 | 6.56 | 10.1 | 10.5 | 14.1 | 11.7 | 10.3 | 9.92 | 10.1 | 6.86 | 9.43 | 7.32 | 7.2 | 5.99 | 6.4 | 8.76 | 10.8 | 9.19 | 9.67 | 11.2 | 16.8 | 17.1 | 6.95 | 9.06 | 5.95 | 7.47 | 5.84 | 10.4 | 12.1 | 8.17 | 12.7 | 19.1 |
| PM10 | 14.2 | 21.3 | 15.1 | 16.1 | 17.5 | 21.4 | 19.8 | 24.7 | 23.6 | 20.4 | 14.7 | 16.9 | 27.6 | 29 | 23.6 | 34 | 20.6 | 15.3 | 17.7 | 17.8 | 17.7 | 22.6 | 14 | 16.8 | 20.5 | 17.3 | 19.1 | 18.3 | 17.9 | 14 | 16.4 | 15.4 | 14.3 | 13.8 | 13.1 | 15.7 | 18 | 16.5 | 17.9 | 22.7 | 22.6 | 28.7 | 15.8 | 18.1 | 15 | 16.5 | 14.9 | 19.6 | 22.3 | 15.8 | 19.7 | 25.9 |
| O₃ | 68.5 | 71.9 | 61.9 | 59 | 39.3 | 33.5 | 24.8 | 26.4 | 33.7 | 40.9 | 42.9 | 46.1 | 51.4 | 60.4 | 53.3 | 34.1 | 30.8 | 39.9 | 32.6 | 34.1 | 34.5 | 31.8 | 40.8 | 54.6 | 59.7 | 55.3 | 50.7 | 42.5 | 42 | 38.9 | 30.6 | 39.8 | 38.1 | 38.5 | 43.7 | 50.3 | 53.7 | 56.3 | 53.3 | 44.8 | 28.4 | 19.9 | 31.3 | 27.4 | 34.4 | 39.5 | 39.2 | 48.3 | 60.2 | 56 | 47 | 45.8 |
| NO₂ | 10.7 | 9.12 | 17.2 | 16.2 | 26.6 | 29.8 | 37.5 | 24.3 | 14.3 | 17.6 | 14.7 | 14.4 | 15.9 | 20.4 | 21.8 | 33.8 | 29.7 | 23.4 | 28.2 | 23.4 | 18.8 | 13.6 | 9.25 | 9.35 | 12.3 | 12.7 | 17.5 | 19.5 | 22.5 | 25.3 | 28.5 | 16.8 | 14 | 13.1 | 12.1 | 10.9 | 12.6 | 17.7 | 18.7 | 22.6 | 24.2 | 26.7 | 27.5 | 23.2 | 17.5 | 13.8 | 10.2 | 15.5 | 17.7 | 16.4 | 25.8 | 24.9 |
| SO₂ | 6.35 | 3.61 | 4.96 | 7.87 | 9.72 | 6.39 | 2.8 | 4.91 | 12.7 | 3.09 | 3.53 | 3.18 | 3.82 | 3.57 | 3.28 | 5.58 | 3.72 | 1.91 | 1.77 | 6.31 | 4.58 | 2.69 | 2.8 | 4.12 | 3.88 | 7.18 | 2.07 | 0.95 | 1.55 | 1.13 | 2.62 | 4.69 | 10.8 | 10.7 | 8.31 | 12 | 14.9 | 9.2 | 9.55 | 12.2 | 14.1 | 11.3 | 9.19 | 5.28 | 6.17 | 4.24 | 5.57 | 6.85 | 3.64 | 4.82 | 4.08 | 4.21 |
A dot on the chart and a dash in the table indicate missing data. Historical values do not describe today’s air quality.
Historical data by station 1
AIR QUALITY ARCHIVE · Cardiff Centre
Cardiff Centre
Station code: Cardiff Centre
Monthly monitoring station data.
PM2.5Lowest 5.84 2016-07Highest 24.7 2019-022016-02 - 2020-05
PM10Lowest 13.1 2017-07Highest 34 2019-022016-02 - 2020-05
O₃Lowest 19.9 2016-12Highest 71.9 2020-042016-02 - 2020-05
NO₂Lowest 9.12 2020-04Highest 37.5 2019-112016-02 - 2020-05
SO₂Lowest 0.95 2018-02Highest 14.9 2017-052016-02 - 2020-05
Scroll the chart or table sideways to see the full period.
| Pollutant | 2020-05 | 2020-04 | 2020-03 | 2020-02 | 2020-01 | 2019-12 | 2019-11 | 2019-10 | 2019-09 | 2019-08 | 2019-07 | 2019-06 | 2019-05 | 2019-04 | 2019-03 | 2019-02 | 2019-01 | 2018-12 | 2018-11 | 2018-10 | 2018-09 | 2018-08 | 2018-07 | 2018-06 | 2018-05 | 2018-04 | 2018-03 | 2018-02 | 2018-01 | 2017-12 | 2017-11 | 2017-10 | 2017-09 | 2017-08 | 2017-07 | 2017-06 | 2017-05 | 2017-04 | 2017-03 | 2017-02 | 2017-01 | 2016-12 | 2016-11 | 2016-10 | 2016-09 | 2016-08 | 2016-07 | 2016-06 | 2016-05 | 2016-04 | 2016-03 | 2016-02 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 | 8.29 | 12.9 | 7.27 | 6 | 7.39 | 7.98 | 7.68 | 6.58 | 6.16 | 7.53 | 5.99 | 11.9 | 10.9 | 19.4 | 11.9 | 24.7 | 11.7 | 9.4 | 12.5 | 8.71 | 6.28 | 6.56 | 10.1 | 10.5 | 14.1 | 11.7 | 10.3 | 9.92 | 10.1 | 6.86 | 9.43 | 7.32 | 7.2 | 5.99 | 6.4 | 8.76 | 10.8 | 9.19 | 9.67 | 11.2 | 16.8 | 17.1 | 6.95 | 9.06 | 5.95 | 7.47 | 5.84 | 10.4 | 12.1 | 8.17 | 12.7 | 19.1 |
| PM10 | 14.2 | 21.3 | 15.1 | 16.1 | 17.5 | 21.4 | 19.8 | 24.7 | 23.6 | 20.4 | 14.7 | 16.9 | 27.6 | 29 | 23.6 | 34 | 20.6 | 15.3 | 17.7 | 17.8 | 17.7 | 22.6 | 14 | 16.8 | 20.5 | 17.3 | 19.1 | 18.3 | 17.9 | 14 | 16.4 | 15.4 | 14.3 | 13.8 | 13.1 | 15.7 | 18 | 16.5 | 17.9 | 22.7 | 22.6 | 28.7 | 15.8 | 18.1 | 15 | 16.5 | 14.9 | 19.6 | 22.3 | 15.8 | 19.7 | 25.9 |
| O₃ | 68.5 | 71.9 | 61.9 | 59 | 39.3 | 33.5 | 24.8 | 26.4 | 33.7 | 40.9 | 42.9 | 46.1 | 51.4 | 60.4 | 53.3 | 34.1 | 30.8 | 39.9 | 32.6 | 34.1 | 34.5 | 31.8 | 40.8 | 54.6 | 59.7 | 55.3 | 50.7 | 42.5 | 42 | 38.9 | 30.6 | 39.8 | 38.1 | 38.5 | 43.7 | 50.3 | 53.7 | 56.3 | 53.3 | 44.8 | 28.4 | 19.9 | 31.3 | 27.4 | 34.4 | 39.5 | 39.2 | 48.3 | 60.2 | 56 | 47 | 45.8 |
| NO₂ | 10.7 | 9.12 | 17.2 | 16.2 | 26.6 | 29.8 | 37.5 | 24.3 | 14.3 | 17.6 | 14.7 | 14.4 | 15.9 | 20.4 | 21.8 | 33.8 | 29.7 | 23.4 | 28.2 | 23.4 | 18.8 | 13.6 | 9.25 | 9.35 | 12.3 | 12.7 | 17.5 | 19.5 | 22.5 | 25.3 | 28.5 | 16.8 | 14 | 13.1 | 12.1 | 10.9 | 12.6 | 17.7 | 18.7 | 22.6 | 24.2 | 26.7 | 27.5 | 23.2 | 17.5 | 13.8 | 10.2 | 15.5 | 17.7 | 16.4 | 25.8 | 24.9 |
| SO₂ | 6.35 | 3.61 | 4.96 | 7.87 | 9.72 | 6.39 | 2.8 | 4.91 | 12.7 | 3.09 | 3.53 | 3.18 | 3.82 | 3.57 | 3.28 | 5.58 | 3.72 | 1.91 | 1.77 | 6.31 | 4.58 | 2.69 | 2.8 | 4.12 | 3.88 | 7.18 | 2.07 | 0.95 | 1.55 | 1.13 | 2.62 | 4.69 | 10.8 | 10.7 | 8.31 | 12 | 14.9 | 9.2 | 9.55 | 12.2 | 14.1 | 11.3 | 9.19 | 5.28 | 6.17 | 4.24 | 5.57 | 6.85 | 3.64 | 4.82 | 4.08 | 4.21 |
A dot on the chart and a dash in the table indicate missing data. Historical values do not describe today’s air quality.
How should I interpret the data and averaging period? →
OpenAQ ↗DEFRA
Environment and quality of life ratings · Cardiff
Archived ratings of the local environment: green spaces, cleanliness, noise and water quality. Opinion indicators are separate from pollutant concentration measurements.
| Indicator | Cardiff | Isle of Man | Ireland | Netherlands | Belgium | Faroe Islands |
|---|---|---|---|---|---|---|
| Green and Parks in the City | 78% | 78% | 72% | 82% | 64% | 87% |
| particulate matter PM2.5 (µg/m³) | 10 | — | — | — | — | — |
| Pleasure of spending time in the city | 69% | 83% | 78% | 88% | 64% | 100% |
| particulate matter PM10 (µg/m³) | 14 | — | — | — | — | — |
| Air Pollution | 35% | 13% | 24% | 21% | 45% | 0% |
| Garbage Disposal | 59% | 78% | 61% | 79% | 54% | 88% |
| Availability and quality of drinking water | 76% | 88% | 72% | 92% | 70% | 98% |
| Cleanliness and tidiness | 52% | 69% | 52% | 77% | 46% | 94% |
| Noise and Light pollution | 45% | 12% | 37% | 31% | 54% | 21% |
| Water Pollution | 24% | 13% | 37% | 17% | 42% | 7.7% |
Air quality in nearby cities
All cities →United Kingdom↗
Bristol
PM2.511.6
PM1014
µg/m³
PM2.5 · FairNO₂ 13.2O₃ 38
November 11, 202602:00
United Kingdom↗
Southampton
PM2.510.5
PM1011.3
µg/m³
PM2.5 · FairNO₂ 25.5O₃ 22
November 11, 202602:00
United Kingdom↗
Plymouth
PM2.56.1
PM106.4
µg/m³
PM2.5 · FairNO₂ 15.6O₃ 30
November 11, 202602:00
United Kingdom↗
Birmingham
PM2.513.6
PM1015.2
µg/m³
PM2.5 · FairNO₂ 9O₃ 54
November 11, 202602:00
United Kingdom↗
Wolverhampton
PM2.512.5
PM1014.1
µg/m³
PM2.5 · FairNO₂ 9.4O₃ 54
November 11, 202602:00
United Kingdom↗
Coventry
PM2.512.7
PM1013.8
µg/m³
PM2.5 · FairNO₂ 7.5O₃ 55
November 11, 202602:00
United Kingdom↗
Stoke-on-Trent
PM2.512
PM1014.8
µg/m³
PM2.5 · FairNO₂ 8.5O₃ 48
November 11, 202602:00
United Kingdom↗
Leicester
PM2.511.8
PM1014.3
µg/m³
PM2.5 · FairNO₂ 6.4O₃ 50
November 11, 202602:00
United Kingdom · air quality in other cities
WEATHER & SURROUNDINGS
Cardiff · weather forecast
Daily maximum and minimum temperatures. Forecast point: 51.48, -3.18.
Scroll the forecast to see the following days.
Cardiff · November 8, 2026: minimum temperature 5.4°C, maximum 10.1°C. Wind: 9 km/h. Humidity: 94%.
Full forecast: temperature, rainfall, wind and humidity
| Date | Day °C | Min °C | Max °C | Night °C | Rain mm | Wind m/s | Humidity % | Clouds % |
|---|---|---|---|---|---|---|---|---|
| 2026-11-08 | 8.7 | 5.4 | 10.1 | 7.9 | 4.3 | 2.5 | 94 | 98 |
| 2026-11-09 | 8.8 | 5.8 | 10.6 | 8 | 0.3 | 6.3 | 90 | 99 |
| 2026-11-10 | 7.2 | 6 | 8.7 | 6.9 | 6.5 | 6.6 | 89 | 100 |
| 2026-11-11 | 7.4 | 5.8 | 9.2 | 7.6 | 2.6 | 6.3 | 84 | 100 |
| 2026-11-12 | 6.3 | 2 | 7.6 | 2 | 1.1 | 5.3 | 75 | 1 |
| 2026-11-13 | 7.2 | 0.4 | 7.5 | 0.4 | 9.8 | 2.7 | 71 | 8 |
| 2026-11-14 | 6.2 | 1.2 | 8.6 | 5.3 | 17.8 | 3.9 | 82 | 97 |
| 2026-11-15 | 11.6 | 4.4 | 11.6 | 11.4 | 6 | 7.8 | 92 | 97 |
| 2026-11-16 | 11.2 | 10.5 | 12.1 | 10.8 | 10 | 9.7 | 88 | 86 |
| 2026-11-17 | 12.4 | 9 | 12.4 | 11.5 | 3.3 | 9.7 | 83 | 57 |
| 2026-11-18 | 12.3 | 10.8 | 12.8 | 10.8 | 6.5 | 11.5 | 81 | 41 |
| 2026-11-19 | 12.1 | 10 | 12.1 | 10 | 8.6 | 9.9 | 82 | 100 |
| 2026-11-20 | 12 | 7.2 | 12 | 7.2 | 3 | 12.1 | 83 | 80 |
| 2026-11-21 | 7.7 | 4.6 | 7.7 | 4.6 | 0.6 | 5.9 | 74 | 54 |
| 2026-11-22 | 10.5 | 4.2 | 10.7 | 9.5 | 9.7 | 11.7 | 93 | 100 |
| 2026-11-23 | 10.4 | 6.9 | 10.4 | 6.9 | 10 | 5.4 | 77 | 17 |
| 2026-11-24 | 8.7 | 6.3 | 8.7 | 6.3 | — | 2.8 | 76 | 72 |
| 2026-11-25 | 11.1 | 6.1 | 11.1 | 9.7 | — | 6.7 | 83 | 100 |
UV index by day · Cardiff
City data.
You can safely stay in the sun. Sunscreen only matters on very long exposure.
0-2 low3-5 moderate6-7 high8-10 very high11+ extreme
Scroll the forecast to see the following days.
Cardiff · November 10, 2026: UV index: 0.3 .
| Indicator | 2026-11-10 | 2026-11-11 | 2026-11-12 | 2026-11-13 | 2026-11-14 | 2026-11-15 | 2026-11-16 | 2026-11-17 | 2026-11-18 | 2026-11-19 | 2026-11-20 | 2026-11-21 | 2026-11-22 | 2026-11-23 | 2026-11-24 | 2026-11-25 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index | 0.3 | 0.5 | 1.9 | 1.8 | 1.3 | 0.5 | 0.9 | 1.2 | 1.5 | 1.1 | 1.4 | 1.4 | 0.2 | 1.4 | 1.3 | — |
AIR QUALITY QUESTIONS
Cardiff · air pollution - questions and answers
What do the latest air quality data show for Cardiff?
Cardiff - latest available concentrations (November 11, 2026, 02:00 local time): PM2.5: 13.4 µg/m³, PM10: 15.5 µg/m³, O₃: 46 µg/m³, NO₂: 11.6 µg/m³, SO₂: 0.7 µg/m³, CO: 214 µg/m³. These are hourly CAMS model values for a point representing the city.
When was PM2.5 highest in Cardiff over the past week?
The highest available daily mean PM2.5 was 24.3 µg/m³ (November 7, 2026). This comparison covers 7 days with data in the seven days before November 11, 2026. The day of the latest reading is excluded because it may be incomplete.
What period does the pollution history for Cardiff cover?
Available monthly means cover 2016-02 - 2020-05. The tables include PM2.5, PM10, O₃, NO₂, SO₂. Missing values are marked with a dash, not treated as zero. Monthly archives and current model data may come from different sources.
Is the PM2.5 concentration for Cardiff an AQI score?
No. PM2.5 and PM10 are concentrations in µg/m³. AQI is a separate index calculated using a defined scale. When comparing air quality, also check other pollutants, the date and the averaging period.
What UV index does the available forecast show for Cardiff?
For November 10, 2026, the forecast UV index is 0.3. The UV section also shows the following available days.
What wind speed is forecast for Cardiff?
For November 8, 2026, forecast wind speed is 9 km/h. The weather table includes wind, temperature and other available parameters for subsequent days.
PM2.5 · PM10 · NO₂ · O₃
Understanding air quality and pollution data
What do PM2.5 and PM10 mean?
PM2.5 and PM10 are fractions of airborne particulate matter. PM2.5 covers fine particles up to 2.5 micrometres in diameter, while PM10 covers particles up to 10 micrometres. Concentrations in µg/m³ tell you how many micrograms of particles are present in a cubic metre of air. Compare values over the same time period.
Where does the air pollution data come from?
The latest concentrations come from the CAMS atmospheric model via Open-Meteo for each city’s coordinates. Values describe a model area, so conditions on individual streets may differ. Historical monitoring station data is shown separately where available.
How does PM2.5 concentration differ from AQI?
PM2.5 is the concentration of one particle fraction, expressed in µg/m³. AQI is an index calculated using a particular scale and thresholds. The pollutant cards show concentrations. Our city ranking compares PM2.5; PM10, ozone, nitrogen dioxide and other available gases add to the picture of air quality.
Which dates do the values and charts cover?
Each current value has a data date and time. Current concentration cards show the latest available hour, daily charts summarise individual days, and monthly records let you compare longer periods. These values represent different time intervals.
How can I check pollution in my city?
Search for your city and open its air quality page. Start with PM2.5 and PM10, then check the other available pollutants and the data timestamp. Charts and tables help you compare concentrations over time. Weather and historical climate information complement the pollution data.