Weatheo

Air quality in Harrow

Air quality index (AQI) and PM2.5 air pollution in Harrow · 16:00, 5 Nov local time

Over the next 24 hours the index should stay between 45 and 67: cleanest air around Fri 16:00, most polluted around Fri 01:00.

Modelled values: Copernicus CAMS, via OpenWeather · updated 16:00

Hourly air quality forecast in Harrow

4-day forecast, 96 hours
  1. 4 PM5410°15 km/h
  2. 5 PM5410°12 km/h
  3. 6 PM5510°13 km/h
  4. 7 PM5610°10 km/h
  5. 8 PM5810°11 km/h
  6. 9 PM609°8 km/h
  7. 10 PM629°8 km/h
  8. 11 PM649°7 km/h
  9. 12 AM668°6 km/h
  10. 1 AM678°5 km/h
  11. 2 AM677°6 km/h
  12. 3 AM667°6 km/h
  13. 4 AM658°7 km/h
  14. 5 AM648°6 km/h
  15. 6 AM638°5 km/h
  16. 7 AM638°4 km/h
  17. 8 AM638°4 km/h
  18. 9 AM639°6 km/h
  19. 10 AM619°6 km/h
  20. 11 AM5810°5 km/h
  21. 12 PM5610°3 km/h
  22. 1 PM5410°6 km/h
  23. 2 PM5211°6 km/h
  24. 3 PM5011°8 km/h
  25. 4 PM4511°5 km/h
  26. 5 PM4210°3 km/h
  27. 6 PM3910°3 km/h
  28. 7 PM3910°5 km/h
  29. 8 PM3910°8 km/h
  30. 9 PM409°5 km/h
  31. 10 PM389°6 km/h
  32. 11 PM399°4 km/h
  33. 12 AM419°5 km/h
  34. 1 AM439°4 km/h
  35. 2 AM469°4 km/h
  36. 3 AM489°5 km/h
  37. 4 AM509°5 km/h
  38. 5 AM509°5 km/h
  39. 6 AM509°3 km/h
  40. 7 AM499°4 km/h
  41. 8 AM499°5 km/h
  42. 9 AM499°4 km/h
  43. 10 AM4610°4 km/h
  44. 11 AM4310°4 km/h
  45. 12 PM4110°5 km/h
  46. 1 PM3810°5 km/h
  47. 2 PM3610°4 km/h
  48. 3 PM3510°3 km/h
  49. 4 PM339°3 km/h
  50. 5 PM329°4 km/h
  51. 6 PM299°4 km/h
  52. 7 PM269°4 km/h
  53. 8 PM249°4 km/h
  54. 9 PM219°5 km/h
  55. 10 PM179°4 km/h
  56. 11 PM169°3 km/h
  57. 12 AM169°3 km/h
  58. 1 AM169°3 km/h
  59. 2 AM169°4 km/h
  60. 3 AM178°4 km/h
  61. 4 AM198°4 km/h
  62. 5 AM237°3 km/h
  63. 6 AM267°3 km/h
  64. 7 AM297°3 km/h
  65. 8 AM317°4 km/h
  66. 9 AM337°4 km/h
  67. 10 AM348°4 km/h
  68. 11 AM379°4 km/h
  69. 12 PM399°4 km/h
  70. 1 PM419°3 km/h
  71. 2 PM419°2 km/h
  72. 3 PM419°1 km/h
  73. 4 PM419°1 km/h
  74. 5 PM399°2 km/h
  75. 6 PM389°3 km/h
  76. 7 PM369°3 km/h
  77. 8 PM349°4 km/h
  78. 9 PM328°4 km/h
  79. 10 PM318°5 km/h
  80. 11 PM307°5 km/h
  81. 12 AM317°6 km/h
  82. 1 AM327°7 km/h
  83. 2 AM357°7 km/h
  84. 3 AM387°8 km/h
  85. 4 AM426°9 km/h
  86. 5 AM436°9 km/h
  87. 6 AM426°10 km/h
  88. 7 AM386°10 km/h
  89. 8 AM366°10 km/h
  90. 9 AM367°10 km/h
  91. 10 AM378°11 km/h
  92. 11 AM438°12 km/h
  93. 12 PM519°13 km/h
  94. 1 PM5310°14 km/h
  95. 2 PM5511°15 km/h
  96. 3 PM5611°15 km/h

Daily air quality forecast in Harrow

DayPeak AQIiconHigh / LowWind
Thu564avg 5810° / 9°C10 km/h
Fri667avg 5411° / 7°C5 km/h
Sat750avg 3810° / 9°C4 km/h
Sun841avg 319° / 7°C3 km/h
Mon956avg 4211° / 6°C10 km/h

Each day shows its worst hour (peak) and its average.

Last update: 16:00
  • PM2.5 Fine particles (≤ 2.5 µm)10.5 µg/m³54
  • PM10 Coarse particles (≤ 10 µm)13.8 µg/m³12
  • NO₂ Nitrogen dioxide13.2 µg/m³6
  • SO₂ Sulphur dioxide3.5 µg/m³1
  • CO Carbon monoxide196.5 µg/m³1
  • O₃ Ozone47.1 µg/m³21

What this means today

Air quality is acceptable. People unusually sensitive to air pollution may want to limit prolonged exertion outdoors.

Sensitive groups
Usually fine; watch for symptoms
Outdoor exercise
Fine for most people
Windows
Open, close if you smell smoke or traffic

The index is set by PM2.5 at 10.5 µg/m³ (sub-index 54).

These values come from the Copernicus atmospheric model as distributed by OpenWeather, sampled at the coordinates of Harrow. They are modelled concentrations on a grid, not readings from a monitoring station inside the town, so neighbouring localities in the same grid cell will show similar figures. Treat them as a regional indication rather than a measurement taken at your street.

Air quality history in Harrow

34 US AQI · Good · November average

31% higher than the 12-month average (26).

Last 30 days
5010039 (max 70)7 Oct3 (max 3)13 (max 19)6 (max 7)5 (max 9)16 (max 29)12 Oct22 (max 39)14 (max 23)26 (max 30)11 (max 22)7 (max 19)17 Oct6 (max 9)8 (max 14)32 (max 57)5 (max 8)4 (max 6)22 Oct6 (max 12)7 (max 23)10 (max 21)14 (max 18)8 (max 14)27 Oct9 (max 11)14 (max 21)42 (max 77)64 (max 80)70 (max 86)1 Nov17 (max 53)7 (max 23)34 (max 52)46 (max 54)

Hourly model data (Copernicus CAMS via OpenWeather), US AQI computed by Weatheo

Air quality near Harrow

Modelled (Copernicus CAMS via Open-Meteo), worst first · Updated 16:00

#PlaceUS AQI
1Wembley50
2Harrow48
3Kenton48
4Northolt48
5Perivale48
6Pinner48
7Sudbury48
8Stanmore42
9Northwood40

United Kingdom: cities ranked by air quality right now

Modelled (Copernicus CAMS via Open-Meteo), worst first · Updated 15:00

#PlaceUS AQI
1Portsmouth53
2Southampton53
3Worthing53
4Reading50
5Brent49
6London48
7Newham45
8Barnet40
9Bristol37
10Caerdydd35
11Edinburgh34
12Glasgow33
13Liverpool31
14Birmingham30
15Belfast29
16Sheffield29
17Coventry28
18Leicester27
19Manchester25
20Leeds24

More about Harrow

Harrow air quality: your questions

What is the air pollution index in Harrow?

Right now the air quality index in Harrow is 54 (Moderate). The main pollutant is fine particles (PM2.5) at 11 µg/m³. Over the next 24 hours the index stays between 45 and 67, best around 4:00 PM. Current weather: Harrow weather today.

Weather across United Kingdom right now