Cluj Napoca, Cluj County, Romania 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
Cluj Napoca, Cluj County, Romania
AQI Trends: Highest and Lowest
Same Day Analysis (29th September):
On this day, AQI across the 2 years varied significantly: 2026 ranks 1st highest AQI at 46 of Good air quality on the same day.
Day & Night AQI Trend: 29th Sep - 30th Sep 2026
Cluj Napoca, Cluj County, Romania
7 AM29th Sep 2026
7 PM
6 AM30th Sep 2026
58AQI
22AQI
60AQI
38AQI
In the last 24 hours,
Cluj Napoca's AQI reached its highest point of 60 at 12 AM during the Night, while the lowest point, 22, was recorded at 6 PM during the Day between 29th Sep and 30th Sep 2026.
Day & Night AQI Trend : Sep 2026
Cluj Napoca, Cluj County, Romania
22°C16/25°C
21°C16/26°C
20°C16/25°C
21°C17/25°C
23°C18/29°C
17°C14/21°C
17°C12/23°C
19°C15/25°C
21°C16/27°C
21°C16/28°C
21°C16/31°C
14°C10/17°C
12°C9/16°C
15°C11/20°C
17°C14/21°C
18°C13/23°C
19°C14/25°C
16°C13/19°C
17°C14/22°C
18°C14/23°C
14°C8/18°C
9°C7/11°C
9°C7/11°C
11°C8/16°C
11°C9/14°C
14°C10/17°C
15°C11/19°C
14°C11/19°C
14°C10/18°C
14°C10/18°C
38AQI
26AQI
44AQI
28AQI
2026 Days Vs Air Quality
Cluj Napoca, Cluj County, Romania
51%
136
36%
96
13%
34
1%
3
Total number of days with different AQI categories in last 273 days in 2026 (92 days remaining)
Under WHO’s Safe Air Quality Limits: 51%
Health Risk Level:
Considerable
In 2026, 51% of 273 days were within WHO’s safe air quality limits, and 49% exceeded them. The risk of health issues is Considerable, with potential for conditions in sensitive individuals.
Annual Air Quality Insights
Cluj Napoca, Cluj County, Romania
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
65AQI (US)
68AQI (US)
51AQI (US)
87AQI (US)
85AQI (US)
111AQI (US)
69AQI (US)
80AQI (US)
82AQI (US)
107AQI (US)
65AQI (US)
113AQI (US)
101AQI (US)
121AQI (US)
143AQI (US)
107AQI (US)
75AQI (US)
134AQI (US)
138AQI (US)
156AQI (US)
157AQI (US)
164AQI (US)
131AQI (US)
142AQI (US)
116AQI (US)
66AQI (US)
110AQI (US)
99AQI (US)
138AQI (US)
146AQI (US)
108AQI (US)
89AQI (US)
93AQI (US)
92AQI (US)
113AQI (US)
69AQI (US)
57AQI (US)
76AQI (US)
103AQI (US)
99AQI (US)
71AQI (US)
79AQI (US)
90AQI (US)
103AQI (US)
69AQI (US)
91AQI (US)
89AQI (US)
101AQI (US)
88AQI (US)
84AQI (US)
75AQI (US)
46AQI (US)
111AQI (US)
110AQI (US)
81AQI (US)
40AQI (US)
55AQI (US)
107AQI (US)
124AQI (US)
112AQI (US)
114AQI (US)
123AQI (US)
108AQI (US)
107AQI (US)
59AQI (US)
91AQI (US)
107AQI (US)
88AQI (US)
87AQI (US)
80AQI (US)
94AQI (US)
103AQI (US)
95AQI (US)
58AQI (US)
81AQI (US)
108AQI (US)
109AQI (US)
76AQI (US)
64AQI (US)
75AQI (US)
61AQI (US)
50AQI (US)
78AQI (US)
90AQI (US)
94AQI (US)
73AQI (US)
65AQI (US)
58AQI (US)
83AQI (US)
69AQI (US)
77AQI (US)
85AQI (US)
116AQI (US)
74AQI (US)
67AQI (US)
65AQI (US)
39AQI (US)
62AQI (US)
58AQI (US)
69AQI (US)
70AQI (US)
78AQI (US)
88AQI (US)
55AQI (US)
82AQI (US)
73AQI (US)
56AQI (US)
48AQI (US)
61AQI (US)
50AQI (US)
31AQI (US)
32AQI (US)
57AQI (US)
36AQI (US)
27AQI (US)
39AQI (US)
44AQI (US)
33AQI (US)
51AQI (US)
47AQI (US)
42AQI (US)
34AQI (US)
34AQI (US)
48AQI (US)
69AQI (US)
55AQI (US)
52AQI (US)
38AQI (US)
30AQI (US)
47AQI (US)
38AQI (US)
43AQI (US)
42AQI (US)
51AQI (US)
37AQI (US)
34AQI (US)
44AQI (US)
58AQI (US)
60AQI (US)
39AQI (US)
41AQI (US)
42AQI (US)
38AQI (US)
24AQI (US)
26AQI (US)
29AQI (US)
14AQI (US)
28AQI (US)
36AQI (US)
37AQI (US)
33AQI (US)
53AQI (US)
47AQI (US)
52AQI (US)
27AQI (US)
18AQI (US)
28AQI (US)
41AQI (US)
54AQI (US)
43AQI (US)
15AQI (US)
12AQI (US)
13AQI (US)
23AQI (US)
24AQI (US)
26AQI (US)
44AQI (US)
56AQI (US)
63AQI (US)
66AQI (US)
45AQI (US)
39AQI (US)
53AQI (US)
46AQI (US)
29AQI (US)
71AQI (US)
81AQI (US)
88AQI (US)
44AQI (US)
62AQI (US)
45AQI (US)
18AQI (US)
18AQI (US)
25AQI (US)
27AQI (US)
28AQI (US)
27AQI (US)
29AQI (US)
34AQI (US)
39AQI (US)
24AQI (US)
37AQI (US)
54AQI (US)
34AQI (US)
43AQI (US)
54AQI (US)
47AQI (US)
41AQI (US)
29AQI (US)
30AQI (US)
31AQI (US)
29AQI (US)
25AQI (US)
28AQI (US)
39AQI (US)
33AQI (US)
29AQI (US)
30AQI (US)
32AQI (US)
44AQI (US)
49AQI (US)
46AQI (US)
37AQI (US)
55AQI (US)
63AQI (US)
64AQI (US)
42AQI (US)
28AQI (US)
50AQI (US)
43AQI (US)
47AQI (US)
44AQI (US)
32AQI (US)
33AQI (US)
32AQI (US)
37AQI (US)
42AQI (US)
30AQI (US)
35AQI (US)
66AQI (US)
53AQI (US)
40AQI (US)
40AQI (US)
36AQI (US)
55AQI (US)
48AQI (US)
29AQI (US)
31AQI (US)
52AQI (US)
46AQI (US)
42AQI (US)
26AQI (US)
24AQI (US)
26AQI (US)
28AQI (US)
27AQI (US)
17AQI (US)
26AQI (US)
29AQI (US)
38AQI (US)
37AQI (US)
40AQI (US)
21AQI (US)
27AQI (US)
37AQI (US)
37AQI (US)
44AQI (US)
61AQI (US)
46AQI (US)
32AQI (US)
31AQI (US)
27AQI (US)
21AQI (US)
30AQI (US)
37AQI (US)
41AQI (US)
36AQI (US)
44AQI (US)
46AQI (US)
108AQI (US)
86AQI (US)
86AQI (US)
60AQI (US)
41AQI (US)
42AQI (US)
34AQI (US)
44AQI (US)
34AQI (US)
No. of days
202659AQI (US)
Highest AQI (US) recorded in
January108AQI (US)
Lowest AQI (US) recorded in
September34AQI (US)
202550AQI (US)
Highest AQI (US) recorded in
December81AQI (US)
Lowest AQI (US) recorded in
August30AQI (US)
Most & Least Polluted Years Over the Last 2 Years
Cluj Napoca's annual 2026 AQI (US) (59) shows an average percentage change of 18% (worsened AQI (US)) compared to previous years: 2025 (50).