Weatheo

Air quality in Semnān

Air quality index (AQI) and PM2.5 air pollution in Semnān · 10:30, 7 Nov local time

Over the next 24 hours the index should stay between 53 and 79: cleanest air around Sun 10:30, most polluted around 18:30.

Modelled values: Copernicus CAMS, via OpenWeather · updated 10:30

Hourly air quality forecast in Semnān

4-day forecast, 96 hours
  1. 10 AM6616°9 km/h
  2. 11 AM6716°10 km/h
  3. 12 PM6916°11 km/h
  4. 1 PM7117°16 km/h
  5. 2 PM7316°20 km/h
  6. 3 PM7516°12 km/h
  7. 4 PM7616°10 km/h
  8. 5 PM7815°4 km/h
  9. 6 PM7915°5 km/h
  10. 7 PM7814°4 km/h
  11. 8 PM7514°3 km/h
  12. 9 PM7114°3 km/h
  13. 10 PM6713°2 km/h
  14. 11 PM6513°8 km/h
  15. 12 AM6313°4 km/h
  16. 1 AM6212°5 km/h
  17. 2 AM6012°6 km/h
  18. 3 AM5812°2 km/h
  19. 4 AM5512°0 km/h
  20. 5 AM5512°3 km/h
  21. 6 AM5412°4 km/h
  22. 7 AM5412°5 km/h
  23. 8 AM5413°4 km/h
  24. 9 AM5414°5 km/h
  25. 10 AM5315°5 km/h
  26. 11 AM5215°5 km/h
  27. 12 PM5215°9 km/h
  28. 1 PM4916°11 km/h
  29. 2 PM4317°13 km/h
  30. 3 PM3817°14 km/h
  31. 4 PM3816°13 km/h
  32. 5 PM3916°6 km/h
  33. 6 PM4115°2 km/h
  34. 7 PM4014°5 km/h
  35. 8 PM3913°3 km/h
  36. 9 PM4013°3 km/h
  37. 10 PM4013°2 km/h
  38. 11 PM3912°3 km/h
  39. 12 AM3912°3 km/h
  40. 1 AM4012°4 km/h
  41. 2 AM4111°3 km/h
  42. 3 AM4311°4 km/h
  43. 4 AM4511°3 km/h
  44. 5 AM4710°2 km/h
  45. 6 AM4910°2 km/h
  46. 7 AM4911°1 km/h
  47. 8 AM4811°4 km/h
  48. 9 AM4613°5 km/h
  49. 10 AM3214°7 km/h
  50. 11 AM2815°12 km/h
  51. 12 PM2717°18 km/h
  52. 1 PM2320°34 km/h
  53. 2 PM2119°32 km/h
  54. 3 PM2119°31 km/h
  55. 4 PM2218°27 km/h
  56. 5 PM2216°18 km/h
  57. 6 PM2115°7 km/h
  58. 7 PM2113°12 km/h
  59. 8 PM2012°8 km/h
  60. 9 PM2011°8 km/h
  61. 10 PM2411°10 km/h
  62. 11 PM2811°10 km/h
  63. 12 AM3211°10 km/h
  64. 1 AM3411°10 km/h
  65. 2 AM3410°10 km/h
  66. 3 AM329°9 km/h
  67. 4 AM319°8 km/h
  68. 5 AM348°7 km/h
  69. 6 AM367°6 km/h
  70. 7 AM347°5 km/h
  71. 8 AM2710°3 km/h
  72. 9 AM2112°2 km/h
  73. 10 AM1613°5 km/h
  74. 11 AM1713°8 km/h
  75. 12 PM1814°11 km/h
  76. 1 PM1814°11 km/h
  77. 2 PM1914°10 km/h
  78. 3 PM1813°9 km/h
  79. 4 PM1912°7 km/h
  80. 5 PM2111°5 km/h
  81. 6 PM2210°3 km/h
  82. 7 PM249°3 km/h
  83. 8 PM268°5 km/h
  84. 9 PM298°7 km/h
  85. 10 PM337°6 km/h
  86. 11 PM366°4 km/h
  87. 12 AM376°3 km/h
  88. 1 AM396°4 km/h
  89. 2 AM425°5 km/h
  90. 3 AM465°7 km/h
  91. 4 AM515°7 km/h
  92. 5 AM525°7 km/h
  93. 6 AM525°6 km/h
  94. 7 AM536°6 km/h
  95. 8 AM528°6 km/h
  96. 9 AM5110°5 km/h

Daily air quality forecast in Semnān

DayPeak AQIiconHigh / LowWind
Sat779avg 7217° / 13°C8 km/h
Sun863avg 4917° / 12°C6 km/h
Mon949avg 3220° / 10°C11 km/h
Tue1036avg 2614° / 6°C7 km/h
Wed1153avg 4810° / 5°C6 km/h

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

Last update: 10:30
  • PM2.5 Fine particles (≤ 2.5 µm)16.9 µg/m³66
  • PM10 Coarse particles (≤ 10 µm)40.6 µg/m³37
  • NO₂ Nitrogen dioxide3.6 µg/m³1
  • SO₂ Sulphur dioxide3.8 µg/m³1
  • CO Carbon monoxide161.3 µg/m³1
  • O₃ Ozone91.6 µg/m³42

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 16.9 µg/m³ (sub-index 66).

These values come from the Copernicus atmospheric model as distributed by OpenWeather, sampled at the coordinates of Semnān. 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 Semnān

44 US AQI · Good · November average

19% lower than the 12-month average (54).

Last 30 days
5010066 (max 73)9 Oct51 (max 72)32 (max 39)37 (max 43)48 (max 54)64 (max 75)14 Oct67 (max 74)63 (max 66)65 (max 67)68 (max 71)74 (max 77)19 Oct74 (max 79)64 (max 69)66 (max 72)60 (max 65)62 (max 65)24 Oct59 (max 62)57 (max 61)53 (max 54)54 (max 56)52 (max 54)29 Oct49 (max 52)55 (max 60)56 (max 60)24 (max 49)37 (max 41)3 Nov53 (max 60)48 (max 64)38 (max 54)59 (max 68)

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

Air quality near Semnān

Modelled (Copernicus CAMS via Open-Meteo), worst first · Updated 10:30

#PlaceUS AQI
1Bābol63
2Qā’em Shahr63
3Behshahr59
4Dāmghān55
5Nekā55
6Damāvand54
7Garmsār54
8Mahdīshahr52
9Semnān52

Iran: cities ranked by air quality right now

Modelled (Copernicus CAMS via Open-Meteo), worst first · Updated 09:30

#PlaceUS AQI
1Shīrāz125
2Borvāyeh-ye Al Bū ‘Azīz113
3Eşfahān103
4Eslāmshahr100
5Tehran100
6Mashhad99
7Bandar ‘Abbās98
8Ahvāz90
9Zāhedān78
10Yazd77
11Kermān72
12Kermānshāh68
13Qom61
14Arāk60
15Karaj58
16Hamadān54
17Tabrīz47
18Rasht45
19Orūmīyeh35
20Ardabīl22

More about Semnān

Semnān air quality: your questions

Is the air quality bad in Semnān today?

Right now the air quality index in Semnān is 66 (Moderate). The main pollutant is fine particles (PM2.5) at 17 µg/m³. Over the next 24 hours the index stays between 53 and 79, best around 10:30 AM. Current weather: Semnān weather today.

Weather across Iran right now