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!
June Air Quality Analysis
Cluj Napoca, Cluj County, Romania
AQI Trends: Highest and Lowest
Same Day Analysis (2nd June):
On this day, AQI across the 2 years varied significantly: 2026 ranks 2nd highest AQI at 37 of Good air quality, showing improvement over 2025 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 2nd Jun - 3rd Jun 2026
Cluj Napoca, Cluj County, Romania
5 AM2nd Jun 2026
8 PM
4 AM3rd Jun 2026
60AQI
8AQI
55AQI
21AQI
In the last 24 hours,
Cluj Napoca's AQI reached its highest point of 60 at 9 AM during the Day, while the lowest point, 8, was recorded at 3 PM during the Day between 2nd Jun and 3rd Jun 2026.
Day & Night AQI Trend : May - Jun 2026
Cluj Napoca, Cluj County, Romania
16°C8/23°C
17°C10/24°C
15°C11/22°C
14°C10/19°C
14°C10/18°C
14°C8/20°C
14°C8/22°C
13°C7/19°C
8°C5/11°C
9°C2/16°C
12°C5/19°C
14°C9/21°C
14°C9/20°C
13°C10/15°C
14°C11/18°C
14°C9/20°C
14°C10/18°C
15°C12/20°C
16°C10/23°C
17°C12/23°C
18°C12/23°C
18°C11/24°C
19°C12/26°C
14°C9/18°C
12°C6/17°C
15°C9/20°C
15°C10/20°C
15°C12/19°C
15°C12/18°C
16°C10/23°C
46AQI
30AQI
48AQI
39AQI
2026 Days Vs Air Quality
Cluj Napoca, Cluj County, Romania
25%
38
50%
75
23%
34
2%
3
Total number of days with different AQI categories in last 154 days in 2026 (211 days remaining)
Under WHO’s Safe Air Quality Limits: 25%
Health Risk Level:
Very high
In 2026, 25% of 154 days were within WHO’s safe air quality limits. The risk of health issues is Very high, including respiratory issues, heart disease, and stress, particularly affecting vulnerable groups.
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)
108AQI (US)
86AQI (US)
86AQI (US)
60AQI (US)
41AQI (US)
37AQI (US)
No. of days
202676AQI (US)
Highest AQI (US) recorded in
January108AQI (US)
Lowest AQI (US) recorded in
June37AQI (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) (76) shows an average percentage change of 52% (worsened AQI (US)) compared to previous years: 2025 (50).