Shahriar, Tehran, Iran Historical Air Quality Analysis

Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!

Good

050

Moderate

100

Poor

150

Unhealthy

200

Severe

300

Hazardous

301+

July Air Quality Analysis
Shahriar, Tehran, Iran

2021

2022

2023

2024

2025

AQI

Days

Days	2025	2024	2023	2022	2021
Jul. 1	112	67	69	120	81
Jul. 2	121	70	81	127	72
Jul. 3		69	70	152	70
Jul. 4		69	108	156	76
Jul. 5		70	128	113	90
Jul. 6		69	100	82	101
Jul. 7		70	80	89	91
Jul. 8		69	71	89	104
Jul. 9		71	94	100	85
Jul. 10		69	103	81	71
Jul. 11		69	112	77	110
Jul. 12		70	128	102	99
Jul. 13		69	112	81	87
Jul. 14		71	102	88	111
Jul. 15		72	94	75	110
Jul. 16		72	126	73	101
Jul. 17		70	128	100	96
Jul. 18		71	112	82	114
Jul. 19		68	114	84	95
Jul. 20		68	128	88	72
Jul. 21		67	122	94	76
Jul. 22		67	116	97	71
Jul. 23		64	93	76	69
Jul. 24		65	89	95	87
Jul. 25		61	92		87
Jul. 26		64			100
Jul. 27		59	113		94
Jul. 28		63	67		89
Jul. 29		59	77		92
Jul. 30		64	87		82
Jul. 31		59	81		89

AQI Trends: Highest and Lowest

Highest AQI recorded on

4th Jul 2022

156AQI

Lowest AQI recorded on

27th Jul 2024

59AQI

Same Day Analysis (2nd July ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 121 of Poor air quality, showing improvement over 2022 on the same day.

Day & Night AQI Trend: 2nd Jul - 3rd Jul 2025
Shahriar, Tehran, Iran

AQI

Day

Night

5 AM2nd Jul 2025

8 PM

4 AM3rd Jul 2025

Day time

Avg. Highest Time

8AM2nd Jul

137AQI

Avg. Lowest Time

7PM2nd Jul

97AQI

Night time

Avg. Highest Time

10PM2nd Jul

134AQI

Avg. Lowest Time

4AM3rd Jul

92AQI

In the last 24 hours,

Shahriar's AQI reached its highest point of 137 at 8 AM during the Day, while the lowest point, 92, was recorded at 4 AM during the Night between 2nd Jul and 3rd Jul 2025.

Day & Night AQI Trend : Jun - Jul 2025
Shahriar, Tehran, Iran

JunJul

03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 01st01st - 02nd02nd - 03rd03rd

Day

Night

30°C23/35°C

24°C19/29°C

21°C16/27°C

21°C16/26°C

22°C17/26°C

21°C15/26°C

22°C16/27°C

20°C16/24°C

22°C16/28°C

24°C20/29°C

27°C22/32°C

28°C22/32°C

29°C24/33°C

30°C25/36°C

27°C21/33°C

23°C17/30°C

22°C16/29°C

25°C18/31°C

29°C24/33°C

28°C23/34°C

25°C18/33°C

24°C19/32°C

23°C16/30°C

25°C18/31°C

27°C22/33°C

27°C20/33°C

29°C25/34°C

30°C25/36°C

28°C22/36°C

27°C22/36°C

5 AM

12 PM

8 PM

12 AM

4 AM

0°C0/0°C

Day time

Avg. Highest Time

5 AM - 8 PM

89AQI

16 hours / Day

480 hours / Month

Avg. Lowest Time

5 AM - 8 PM

89AQI

16 hours / Day

480 hours / Month

In the last 30 days, during the daytime, the highest AQI was between 5 AM to 8 PM (Avg. 89), while the lowest AQI was between 5 AM to 8 PM (Avg. 89).

Night time

Avg. Highest Time

12 AM - 11 PM

91AQI

8 hours / Day

240 hours / Month

Avg. Lowest Time

12 AM - 11 PM

91AQI

8 hours / Day

240 hours / Month

In the last 30 days, during the daytime, the highest AQI was between 12 AM to 11 PM (Avg. 91), while the lowest AQI was between 12 AM to 11 PM (Avg. 91).

2025 Days Vs Air Quality
Shahriar, Tehran, Iran

2025

78%

142

17%

0.5%

Total number of days with different AQI categories in last 184 days in 2025 (181 days remaining)

Good

9 Days

Moderate

142 Days

Poor

31 Days

Unhealthy

1 Days

Severe

0 Days

Hazardous

0 Days

Under WHO’s Safe Air Quality Limits: 5%

Health Risk Level:

Extreme

In 2025, 5% of 184 days were within WHO’s safe air quality limits. The risk of health issues is Extreme, potentially causing respiratory problems, heart disease, skin issues, and stress, especially for children, the elderly, and those with pre-existing conditions.

Annual Air Quality Insights
Shahriar, Tehran, Iran

AQI levels in 2025

AQI

PM2.5

PM10

SO2

NO2

Sun.Mon.Tue.Wed.Thu.Fri.Sat.

Jan.

Feb.

Mar.

Apr.

May

Jun.

Jul.

Aug.

Sep.

Oct.

Nov.

Dec.

96AQI

74AQI

80AQI

74AQI

86AQI

117AQI

No. of days

Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days

202581AQI

142

Highest AQI recorded in

July

117AQI

Lowest AQI recorded in

April

74AQI

202487AQI

229

Highest AQI recorded in

December

125AQI

Lowest AQI recorded in

July

67AQI

2023104AQI

175

Highest AQI recorded in

November

215AQI

Lowest AQI recorded in

April

72AQI

2022101AQI

141

Highest AQI recorded in

December

127AQI

Lowest AQI recorded in

March

79AQI

202181AQI

218

Highest AQI recorded in

November

109AQI

Lowest AQI recorded in

March

35AQI

202079AQI

128

Highest AQI recorded in

December

110AQI

Lowest AQI recorded in

March

31AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded

2023(Avg.)

104AQI

Least Polluted Year Recorded

2020(Avg.)

79AQI

Shahriar's annual 2025 AQI (81) shows an average percentage change of -9.1% (improved AQI) compared to previous years: 2020 (79), 2021 (81), 2022 (101), 2023 (104), 2024 (87).


5 AM	123
6 AM	119
7 AM	126
8 AM	137
9 AM	136
10 AM	130
11 AM	104
12 PM	109
1 PM	102
2 PM	100
3 PM	97
4 PM	97
5 PM	97
6 PM	97
7 PM	97
8 PM	99
9 PM	130
10 PM	134
11 PM	115
12 AM	115
1 AM	115
2 AM	115
3 AM	115
4 AM	92

Shahriar, Tehran, Iran Historical Air Quality Analysis

July Air Quality AnalysisShahriar, Tehran, Iran

Day & Night AQI Trend: 2nd Jul - 3rd Jul 2025Shahriar, Tehran, Iran

Day & Night AQI Trend : Jun - Jul 2025Shahriar, Tehran, Iran

2025 Days Vs Air Quality Shahriar, Tehran, Iran

Annual Air Quality InsightsShahriar, Tehran, Iran

AQI levels in 2025

No. of days

July Air Quality Analysis
Shahriar, Tehran, Iran

Day & Night AQI Trend: 2nd Jul - 3rd Jul 2025
Shahriar, Tehran, Iran

Day & Night AQI Trend : Jun - Jul 2025
Shahriar, Tehran, Iran

2025 Days Vs Air Quality
Shahriar, Tehran, Iran

Annual Air Quality Insights
Shahriar, Tehran, Iran