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 (4th June):
On this day, AQI across the 2 years varied significantly: 2026 ranks 1st highest AQI at 53 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 3rd Jun - 4th Jun 2026
Cluj Napoca, Cluj County, Romania
5 AM3rd Jun 2026
9 PM
4 AM4th Jun 2026
57AQI
22AQI
79AQI
30AQI
In the last 24 hours,
Cluj Napoca's AQI reached its highest point of 79 at 12 AM during the Night, while the lowest point, 22, was recorded at 5 PM during the Day between 3rd Jun and 4th Jun 2026.
Day & Night AQI Trend : May - Jun 2026
Cluj Napoca, Cluj County, Romania
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
17°C13/23°C
47AQI
31AQI
49AQI
44AQI
2026 Days Vs Air Quality
Cluj Napoca, Cluj County, Romania
26%
39
50%
76
22%
34
2%
3
Total number of days with different AQI categories in last 155 days in 2026 (210 days remaining)
Under WHO’s Safe Air Quality Limits: 26%
Health Risk Level:
Very high
In 2026, 26% of 155 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)
33AQI (US)
53AQI (US)
108AQI (US)
86AQI (US)
86AQI (US)
60AQI (US)
41AQI (US)
40AQI (US)
No. of days
202675AQI (US)
Highest AQI (US) recorded in
January108AQI (US)
Lowest AQI (US) recorded in
June40AQI (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) (75) shows an average percentage change of 50% (worsened AQI (US)) compared to previous years: 2025 (50).