Weatheo

Air quality in Harrow

Air quality index (AQI) and PM2.5 air pollution in Harrow · 18:00, 5 Nov local time

Over the next 24 hours the index should stay between 39 and 67: cleanest air around Fri 18:00, most polluted around Fri 01:00.

Modelled values: Copernicus CAMS, via OpenWeather · updated 18:00

Hourly air quality forecast in Harrow

4-day forecast, 96 hours
  1. 6 PM5510°12 km/h
  2. 7 PM5610°10 km/h
  3. 8 PM5810°9 km/h
  4. 9 PM6010°8 km/h
  5. 10 PM629°6 km/h
  6. 11 PM649°5 km/h
  7. 12 AM669°7 km/h
  8. 1 AM679°7 km/h
  9. 2 AM679°8 km/h
  10. 3 AM669°7 km/h
  11. 4 AM658°3 km/h
  12. 5 AM649°4 km/h
  13. 6 AM639°6 km/h
  14. 7 AM639°5 km/h
  15. 8 AM639°5 km/h
  16. 9 AM639°6 km/h
  17. 10 AM6110°5 km/h
  18. 11 AM5811°5 km/h
  19. 12 PM5611°4 km/h
  20. 1 PM5411°4 km/h
  21. 2 PM5212°4 km/h
  22. 3 PM5012°6 km/h
  23. 4 PM4511°7 km/h
  24. 5 PM4211°6 km/h
  25. 6 PM3911°6 km/h
  26. 7 PM3910°6 km/h
  27. 8 PM3910°8 km/h
  28. 9 PM4010°7 km/h
  29. 10 PM389°5 km/h
  30. 11 PM399°5 km/h
  31. 12 AM419°5 km/h
  32. 1 AM439°5 km/h
  33. 2 AM468°5 km/h
  34. 3 AM488°5 km/h
  35. 4 AM507°5 km/h
  36. 5 AM506°5 km/h
  37. 6 AM506°5 km/h
  38. 7 AM496°6 km/h
  39. 8 AM497°5 km/h
  40. 9 AM497°6 km/h
  41. 10 AM468°5 km/h
  42. 11 AM439°3 km/h
  43. 12 PM4110°5 km/h
  44. 1 PM3810°6 km/h
  45. 2 PM3611°5 km/h
  46. 3 PM3511°8 km/h
  47. 4 PM3310°6 km/h
  48. 5 PM329°5 km/h
  49. 6 PM299°4 km/h
  50. 7 PM269°4 km/h
  51. 8 PM249°4 km/h
  52. 9 PM219°5 km/h
  53. 10 PM179°4 km/h
  54. 11 PM169°3 km/h
  55. 12 AM169°3 km/h
  56. 1 AM169°3 km/h
  57. 2 AM169°4 km/h
  58. 3 AM178°4 km/h
  59. 4 AM198°4 km/h
  60. 5 AM237°3 km/h
  61. 6 AM267°3 km/h
  62. 7 AM297°3 km/h
  63. 8 AM317°4 km/h
  64. 9 AM337°4 km/h
  65. 10 AM348°4 km/h
  66. 11 AM379°4 km/h
  67. 12 PM399°4 km/h
  68. 1 PM419°3 km/h
  69. 2 PM419°2 km/h
  70. 3 PM419°1 km/h
  71. 4 PM419°1 km/h
  72. 5 PM399°2 km/h
  73. 6 PM389°3 km/h
  74. 7 PM369°3 km/h
  75. 8 PM349°4 km/h
  76. 9 PM328°4 km/h
  77. 10 PM318°5 km/h
  78. 11 PM307°5 km/h
  79. 12 AM317°6 km/h
  80. 1 AM327°7 km/h
  81. 2 AM357°7 km/h
  82. 3 AM387°8 km/h
  83. 4 AM426°9 km/h
  84. 5 AM436°9 km/h
  85. 6 AM426°10 km/h
  86. 7 AM386°10 km/h
  87. 8 AM366°10 km/h
  88. 9 AM367°10 km/h
  89. 10 AM378°11 km/h
  90. 11 AM438°12 km/h
  91. 12 PM519°13 km/h
  92. 1 PM5310°14 km/h
  93. 2 PM5511°15 km/h
  94. 3 PM5611°15 km/h
  95. 4 PM5510°15 km/h
  96. 5 PM5310°15 km/h

Daily air quality forecast in Harrow

DayPeak AQIiconHigh / LowWind
Thu564avg 5910° / 9°C9 km/h
Fri667avg 5412° / 8°C6 km/h
Sat750avg 3811° / 6°C5 km/h
Sun841avg 319° / 7°C3 km/h
Mon956avg 4311° / 6°C11 km/h

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

Last update: 18:00
  • PM2.5 Fine particles (≤ 2.5 µm)11.4 µg/m³55
  • PM10 Coarse particles (≤ 10 µm)14.8 µg/m³13
  • NO₂ Nitrogen dioxide13.1 µg/m³6
  • SO₂ Sulphur dioxide3.6 µg/m³1
  • CO Carbon monoxide201.5 µg/m³1
  • O₃ Ozone45.9 µg/m³20

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 11.4 µg/m³ (sub-index 55).

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

35 US AQI · Good · November average

30% higher than the 12-month average (27).

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)47 (max 55)

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 18:00

#PlaceUS AQI
1Wembley51
2Harrow50
3Kenton50
4Northolt50
5Perivale50
6Pinner50
7Sudbury50
8Stanmore45
9Northwood42

United Kingdom: cities ranked by air quality right now

Modelled (Copernicus CAMS via Open-Meteo), worst first · Updated 18:00

#PlaceUS AQI
1Southampton55
2Worthing55
3Portsmouth54
4Brent51
5London51
6Reading51
7Newham50
8Barnet43
9Bristol41
10Caerdydd38
11Edinburgh35
12Birmingham33
13Glasgow32
14Liverpool32
15Coventry31
16Leicester30
17Sheffield30
18Belfast29
19Manchester27
20Leeds25

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 55 (Moderate). The main pollutant is fine particles (PM2.5) at 11 µg/m³. Over the next 24 hours the index stays between 39 and 67, best around 6:00 PM. Current weather: Harrow weather today.

Weather across United Kingdom right now