Shahriar, Tehran, Iran Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
October Air Quality Analysis
Shahriar, Tehran, Iran
AQI Trends: Highest and Lowest
Same Day Analysis (4th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 74 of Moderate air quality, showing improvement over 2024 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 4th Oct - 5th Oct 2025
Shahriar, Tehran, Iran
6 AM4th Oct 2025
6 PM
5 AM5th Oct 2025
77AQI
62AQI
92AQI
63AQI
In the last 24 hours,
Shahriar's AQI reached its highest point of 92 at 11 PM during the Night, while the lowest point, 62, was recorded at 6 AM during the Day between 4th Oct and 5th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Shahriar, Tehran, Iran
28°C22/31°C
27°C21/31°C
27°C21/31°C
27°C20/31°C
27°C20/32°C
29°C25/32°C
25°C19/29°C
22°C17/27°C
21°C15/26°C
21°C16/25°C
20°C14/24°C
22°C16/26°C
22°C17/27°C
22°C16/26°C
25°C20/29°C
22°C18/24°C
18°C13/23°C
16°C12/20°C
16°C11/22°C
17°C12/22°C
18°C12/22°C
20°C15/23°C
21°C15/25°C
21°C15/25°C
22°C17/26°C
23°C19/26°C
19°C15/23°C
17°C12/22°C
19°C13/23°C
21°C16/26°C
--°C/°C
68AQI
65AQI
71AQI
66AQI
2025 Days Vs Air Quality
Shahriar, Tehran, Iran
5%
13
81%
223
14%
40
0.3%
1
Total number of days with different AQI categories in last 278 days in 2025 (87 days remaining)
Under WHO’s Safe Air Quality Limits: 5%
Health Risk Level:
Extreme
In 2025, 5% of 278 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
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
79AQI
61AQI
70AQI
75AQI
75AQI
110AQI
131AQI
103AQI
124AQI
132AQI
144AQI
154AQI
104AQI
90AQI
121AQI
127AQI
74AQI
73AQI
83AQI
82AQI
67AQI
70AQI
88AQI
79AQI
86AQI
98AQI
91AQI
74AQI
83AQI
113AQI
104AQI
122AQI
149AQI
119AQI
104AQI
96AQI
100AQI
71AQI
56AQI
65AQI
57AQI
85AQI
111AQI
123AQI
67AQI
64AQI
59AQI
64AQI
67AQI
61AQI
74AQI
65AQI
53AQI
46AQI
37AQI
37AQI
40AQI
42AQI
47AQI
53AQI
42AQI
46AQI
46AQI
69AQI
60AQI
65AQI
53AQI
58AQI
63AQI
59AQI
61AQI
69AQI
90AQI
123AQI
138AQI
122AQI
141AQI
146AQI
130AQI
96AQI
68AQI
68AQI
82AQI
55AQI
79AQI
76AQI
81AQI
83AQI
82AQI
81AQI
70AQI
80AQI
70AQI
67AQI
67AQI
67AQI
68AQI
74AQI
70AQI
71AQI
75AQI
76AQI
75AQI
82AQI
79AQI
78AQI
63AQI
69AQI
68AQI
70AQI
64AQI
69AQI
70AQI
77AQI
86AQI
89AQI
82AQI
77AQI
74AQI
81AQI
75AQI
73AQI
69AQI
76AQI
73AQI
75AQI
77AQI
79AQI
70AQI
69AQI
68AQI
66AQI
66AQI
83AQI
72AQI
74AQI
65AQI
70AQI
73AQI
77AQI
71AQI
87AQI
87AQI
73AQI
71AQI
72AQI
73AQI
75AQI
75AQI
76AQI
75AQI
73AQI
73AQI
69AQI
68AQI
69AQI
72AQI
74AQI
78AQI
71AQI
72AQI
78AQI
76AQI
83AQI
81AQI
79AQI
80AQI
92AQI
99AQI
108AQI
92AQI
93AQI
95AQI
98AQI
96AQI
99AQI
101AQI
101AQI
102AQI
108AQI
111AQI
112AQI
117AQI
108AQI
110AQI
107AQI
116AQI
117AQI
106AQI
98AQI
98AQI
105AQI
103AQI
101AQI
96AQI
92AQI
86AQI
84AQI
85AQI
84AQI
82AQI
85AQI
84AQI
82AQI
82AQI
77AQI
69AQI
70AQI
71AQI
76AQI
78AQI
85AQI
93AQI
90AQI
90AQI
91AQI
93AQI
91AQI
88AQI
81AQI
82AQI
80AQI
93AQI
88AQI
89AQI
82AQI
85AQI
92AQI
82AQI
88AQI
96AQI
93AQI
97AQI
93AQI
91AQI
100AQI
87AQI
86AQI
76AQI
77AQI
78AQI
73AQI
77AQI
67AQI
76AQI
76AQI
63AQI
79AQI
75AQI
77AQI
79AQI
78AQI
80AQI
81AQI
76AQI
78AQI
74AQI
72AQI
71AQI
70AQI
68AQI
68AQI
75AQI
75AQI
65AQI
62AQI
55AQI
49AQI
47AQI
35AQI
45AQI
68AQI
72AQI
77AQI
58AQI
61AQI
74AQI
96AQI
74AQI
80AQI
74AQI
74AQI
86AQI
92AQI
87AQI
69AQI
68AQI
No. of days
202581AQI
Highest AQI recorded in
January96AQI
Lowest AQI recorded in
October68AQI
202487AQI
Highest AQI recorded in
December125AQI
Lowest AQI recorded in
July67AQI
2023104AQI
Highest AQI recorded in
November215AQI
Lowest AQI recorded in
April72AQI
2022101AQI
Highest AQI recorded in
December127AQI
Lowest AQI recorded in
March79AQI
202181AQI
Highest AQI recorded in
November109AQI
Lowest AQI recorded in
March35AQI
202079AQI
Highest AQI recorded in
December110AQI
Lowest AQI recorded in
March31AQI
Most & Least Polluted Years Over the Last 6 Years
Shahriar's annual 2025 AQI (81) shows an average percentage change of -9.04% (improved AQI) compared to previous years: 2020 (79), 2021 (81), 2022 (101), 2023 (104), 2024 (87).