Metro, Karaj, Alborz, Iran Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
September Air Quality Analysis
Metro, Karaj, Alborz, Iran
AQI Trends: Highest and Lowest
Same Day Analysis (17th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 72 of Moderate air quality, showing improvement over 2022 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 17th Sep - 18th Sep 2025
Metro, Karaj, Alborz, Iran
6 AM17th Sep 2025
7 PM
5 AM18th Sep 2025
83AQI
66AQI
86AQI
58AQI
In the last 24 hours,
Metro's AQI reached its highest point of 86 at 2 AM during the Night, while the lowest point, 58, was recorded at 11 PM during the Night between 17th Sep and 18th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Metro, Karaj, Alborz, Iran
30°C24/34°C
30°C24/34°C
30°C24/34°C
28°C23/33°C
27°C21/32°C
29°C23/33°C
29°C24/33°C
28°C22/32°C
28°C23/32°C
27°C21/31°C
25°C20/30°C
26°C20/30°C
27°C23/31°C
27°C22/32°C
25°C19/29°C
26°C21/30°C
28°C22/32°C
28°C22/32°C
26°C21/32°C
27°C21/32°C
27°C21/32°C
27°C20/33°C
29°C24/34°C
25°C21/31°C
23°C19/28°C
22°C17/27°C
22°C18/26°C
20°C16/25°C
22°C15/26°C
22°C18/27°C
--°C/°C
84AQI
80AQI
85AQI
78AQI
2025 Days Vs Air Quality
Metro, Karaj, Alborz, Iran
3%
9
72%
187
23%
60
2%
4
Total number of days with different AQI categories in last 261 days in 2025 (104 days remaining)
Under WHO’s Safe Air Quality Limits: 3%
Health Risk Level:
Extreme
In 2025, 3% of 261 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
Metro, Karaj, Alborz, Iran
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
89AQI
72AQI
77AQI
94AQI
82AQI
123AQI
141AQI
140AQI
150AQI
155AQI
156AQI
162AQI
125AQI
114AQI
134AQI
133AQI
80AQI
75AQI
111AQI
88AQI
75AQI
84AQI
116AQI
89AQI
99AQI
121AQI
120AQI
75AQI
83AQI
132AQI
133AQI
146AQI
159AQI
128AQI
101AQI
89AQI
107AQI
82AQI
54AQI
64AQI
58AQI
102AQI
125AQI
133AQI
66AQI
62AQI
61AQI
63AQI
74AQI
69AQI
67AQI
60AQI
50AQI
45AQI
38AQI
29AQI
41AQI
45AQI
52AQI
57AQI
43AQI
48AQI
49AQI
76AQI
64AQI
64AQI
52AQI
63AQI
67AQI
66AQI
70AQI
76AQI
94AQI
111AQI
117AQI
114AQI
130AQI
145AQI
126AQI
99AQI
73AQI
71AQI
81AQI
61AQI
76AQI
75AQI
82AQI
86AQI
83AQI
81AQI
78AQI
79AQI
72AQI
72AQI
71AQI
62AQI
68AQI
68AQI
68AQI
68AQI
79AQI
82AQI
76AQI
82AQI
78AQI
81AQI
68AQI
72AQI
68AQI
70AQI
88AQI
83AQI
72AQI
76AQI
86AQI
89AQI
82AQI
78AQI
77AQI
80AQI
77AQI
76AQI
78AQI
82AQI
78AQI
79AQI
83AQI
82AQI
71AQI
73AQI
68AQI
69AQI
70AQI
98AQI
83AQI
79AQI
80AQI
79AQI
81AQI
88AQI
77AQI
104AQI
104AQI
77AQI
76AQI
80AQI
79AQI
80AQI
86AQI
100AQI
78AQI
76AQI
80AQI
76AQI
77AQI
72AQI
75AQI
78AQI
86AQI
76AQI
75AQI
87AQI
86AQI
92AQI
89AQI
89AQI
96AQI
103AQI
111AQI
126AQI
101AQI
126AQI
149AQI
108AQI
110AQI
109AQI
109AQI
113AQI
118AQI
130AQI
139AQI
124AQI
132AQI
120AQI
129AQI
127AQI
127AQI
128AQI
121AQI
118AQI
126AQI
141AQI
138AQI
135AQI
131AQI
118AQI
94AQI
98AQI
89AQI
103AQI
98AQI
89AQI
89AQI
83AQI
83AQI
77AQI
71AQI
69AQI
71AQI
76AQI
79AQI
83AQI
91AQI
88AQI
87AQI
91AQI
90AQI
90AQI
87AQI
81AQI
80AQI
80AQI
94AQI
88AQI
90AQI
82AQI
81AQI
89AQI
82AQI
89AQI
99AQI
92AQI
97AQI
96AQI
91AQI
102AQI
91AQI
92AQI
78AQI
80AQI
80AQI
77AQI
79AQI
68AQI
76AQI
79AQI
63AQI
82AQI
77AQI
80AQI
82AQI
79AQI
83AQI
83AQI
78AQI
78AQI
76AQI
74AQI
74AQI
72AQI
111AQI
78AQI
81AQI
76AQI
81AQI
99AQI
105AQI
88AQI
77AQI
No. of days
202589AQI
Highest AQI recorded in
January111AQI
Lowest AQI recorded in
April76AQI
202485AQI
Highest AQI recorded in
December126AQI
Lowest AQI recorded in
January31AQI
2023128AQI
Highest AQI recorded in
January147AQI
Lowest AQI recorded in
February95AQI
2022126AQI
Highest AQI recorded in
April146AQI
Lowest AQI recorded in
August103AQI
2021108AQI
Highest AQI recorded in
December133AQI
Lowest AQI recorded in
May90AQI
2020109AQI
Highest AQI recorded in
December129AQI
Lowest AQI recorded in
May12AQI
Most & Least Polluted Years Over the Last 6 Years
Metro's annual 2025 AQI (89) shows an average percentage change of -18.2% (improved AQI) compared to previous years: 2020 (109), 2021 (108), 2022 (126), 2023 (128), 2024 (85).