Cluj Napoca, Cluj, 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, Romania
AQI Trends: Highest and Lowest
Same Day Analysis (2nd June):
On this day, AQI across the 5 years varied significantly: 2026 ranks 1st highest AQI at 41 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 1st Jun - 2nd Jun 2026
Cluj Napoca, Cluj, Romania
5 AM1st Jun 2026
8 PM
4 AM2nd Jun 2026
69AQI
26AQI
72AQI
57AQI
In the last 24 hours,
Cluj Napoca's AQI reached its highest point of 72 at 11 PM during the Night, while the lowest point, 26, was recorded at 11 AM during the Day between 1st Jun and 2nd Jun 2026.
Day & Night AQI Trend : May - Jun 2026
Cluj Napoca, Cluj, Romania
13°C5/20°C
16°C8/23°C
17°C10/24°C
15°C11/22°C
14°C10/19°C
13°C9/18°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°C6/16°C
15°C9/20°C
15°C10/20°C
15°C12/19°C
15°C12/18°C
48AQI
32AQI
51AQI
41AQI
2026 Days Vs Air Quality
Cluj Napoca, Cluj, Romania
21%
31
55%
82
23%
34
2%
3
Total number of days with different AQI categories in last 153 days in 2026 (212 days remaining)
Under WHO’s Safe Air Quality Limits: 21%
Health Risk Level:
Very high
In 2026, 21% of 153 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, Romania
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
68AQI (US)
71AQI (US)
56AQI (US)
92AQI (US)
89AQI (US)
106AQI (US)
72AQI (US)
80AQI (US)
82AQI (US)
105AQI (US)
66AQI (US)
114AQI (US)
101AQI (US)
119AQI (US)
143AQI (US)
106AQI (US)
75AQI (US)
134AQI (US)
138AQI (US)
155AQI (US)
157AQI (US)
162AQI (US)
134AQI (US)
139AQI (US)
118AQI (US)
67AQI (US)
107AQI (US)
97AQI (US)
139AQI (US)
145AQI (US)
110AQI (US)
89AQI (US)
93AQI (US)
91AQI (US)
108AQI (US)
69AQI (US)
55AQI (US)
76AQI (US)
103AQI (US)
101AQI (US)
71AQI (US)
78AQI (US)
91AQI (US)
102AQI (US)
67AQI (US)
89AQI (US)
84AQI (US)
95AQI (US)
87AQI (US)
86AQI (US)
79AQI (US)
53AQI (US)
113AQI (US)
108AQI (US)
86AQI (US)
43AQI (US)
58AQI (US)
108AQI (US)
123AQI (US)
114AQI (US)
119AQI (US)
125AQI (US)
112AQI (US)
110AQI (US)
62AQI (US)
92AQI (US)
110AQI (US)
91AQI (US)
86AQI (US)
83AQI (US)
98AQI (US)
108AQI (US)
100AQI (US)
67AQI (US)
87AQI (US)
113AQI (US)
115AQI (US)
84AQI (US)
66AQI (US)
76AQI (US)
62AQI (US)
53AQI (US)
82AQI (US)
95AQI (US)
97AQI (US)
81AQI (US)
68AQI (US)
66AQI (US)
89AQI (US)
78AQI (US)
86AQI (US)
93AQI (US)
122AQI (US)
81AQI (US)
73AQI (US)
71AQI (US)
43AQI (US)
66AQI (US)
64AQI (US)
76AQI (US)
76AQI (US)
81AQI (US)
91AQI (US)
60AQI (US)
85AQI (US)
75AQI (US)
62AQI (US)
54AQI (US)
68AQI (US)
57AQI (US)
32AQI (US)
34AQI (US)
59AQI (US)
41AQI (US)
32AQI (US)
46AQI (US)
51AQI (US)
40AQI (US)
58AQI (US)
54AQI (US)
48AQI (US)
36AQI (US)
38AQI (US)
48AQI (US)
69AQI (US)
56AQI (US)
53AQI (US)
41AQI (US)
34AQI (US)
52AQI (US)
43AQI (US)
43AQI (US)
42AQI (US)
51AQI (US)
37AQI (US)
34AQI (US)
44AQI (US)
58AQI (US)
60AQI (US)
39AQI (US)
41AQI (US)
43AQI (US)
40AQI (US)
30AQI (US)
32AQI (US)
33AQI (US)
22AQI (US)
35AQI (US)
40AQI (US)
41AQI (US)
108AQI (US)
86AQI (US)
90AQI (US)
65AQI (US)
44AQI (US)
41AQI (US)
No. of days
202678AQI (US)
Highest AQI (US) recorded in
January108AQI (US)
Lowest AQI (US) recorded in
June41AQI (US)
202550AQI (US)
Highest AQI (US) recorded in
December81AQI (US)
Lowest AQI (US) recorded in
August30AQI (US)
202445AQI (US)
Highest AQI (US) recorded in
January75AQI (US)
Lowest AQI (US) recorded in
September16AQI (US)
202349AQI (US)
Highest AQI (US) recorded in
December70AQI (US)
Lowest AQI (US) recorded in
June32AQI (US)
202233AQI (US)
Highest AQI (US) recorded in
December82AQI (US)
Lowest AQI (US) recorded in
August14AQI (US)
202126AQI (US)
Highest AQI (US) recorded in
January34AQI (US)
Lowest AQI (US) recorded in
September19AQI (US)
202011AQI (US)
Highest AQI (US) recorded in
November18AQI (US)
Lowest AQI (US) recorded in
June6AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Cluj Napoca's annual 2026 AQI (US) (78) shows an average percentage change of 188.9% (worsened AQI (US)) compared to previous years: 2020 (11), 2021 (26), 2022 (33), 2023 (49), 2024 (45), 2025 (50).