Strada Observatorului, 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
Strada Observatorului, Cluj Napoca, Cluj, Romania
AQI Trends: Highest and Lowest
Same Day Analysis (3rd June):
On this day, AQI across the 3 years varied significantly: 2026 ranks 3rd highest AQI at 33 of Good air quality, showing improvement over 2025 and 2024 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 3rd Jun - 4th Jun 2026
Strada Observatorului, Cluj Napoca, Cluj, Romania
5 AM3rd Jun 2026
9 PM
4 AM4th Jun 2026
58AQI
21AQI
74AQI
30AQI
In the last 24 hours,
Strada Observatorului's AQI reached its highest point of 74 at 12 AM during the Night, while the lowest point, 21, was recorded at 8 PM during the Day between 3rd Jun and 4th Jun 2026.
Day & Night AQI Trend : May - Jun 2026
Strada Observatorului, Cluj Napoca, Cluj, Romania
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°C6/17°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
46AQI
31AQI
49AQI
43AQI
2026 Days Vs Air Quality
Strada Observatorului, Cluj Napoca, Cluj, Romania
25%
38
51%
77
22%
33
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: 25%
Health Risk Level:
Very high
In 2026, 25% 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
Strada Observatorului, Cluj Napoca, Cluj, Romania
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
73AQI (US)
72AQI (US)
60AQI (US)
91AQI (US)
89AQI (US)
110AQI (US)
72AQI (US)
83AQI (US)
85AQI (US)
110AQI (US)
67AQI (US)
118AQI (US)
104AQI (US)
123AQI (US)
143AQI (US)
108AQI (US)
75AQI (US)
136AQI (US)
138AQI (US)
156AQI (US)
157AQI (US)
164AQI (US)
128AQI (US)
142AQI (US)
116AQI (US)
64AQI (US)
110AQI (US)
100AQI (US)
140AQI (US)
145AQI (US)
109AQI (US)
88AQI (US)
96AQI (US)
95AQI (US)
114AQI (US)
70AQI (US)
55AQI (US)
75AQI (US)
101AQI (US)
98AQI (US)
73AQI (US)
79AQI (US)
89AQI (US)
102AQI (US)
69AQI (US)
92AQI (US)
90AQI (US)
100AQI (US)
89AQI (US)
86AQI (US)
77AQI (US)
45AQI (US)
109AQI (US)
108AQI (US)
82AQI (US)
40AQI (US)
54AQI (US)
106AQI (US)
124AQI (US)
112AQI (US)
115AQI (US)
121AQI (US)
106AQI (US)
106AQI (US)
59AQI (US)
91AQI (US)
106AQI (US)
90AQI (US)
85AQI (US)
79AQI (US)
94AQI (US)
102AQI (US)
94AQI (US)
57AQI (US)
80AQI (US)
109AQI (US)
110AQI (US)
79AQI (US)
62AQI (US)
75AQI (US)
61AQI (US)
51AQI (US)
79AQI (US)
93AQI (US)
96AQI (US)
77AQI (US)
66AQI (US)
62AQI (US)
86AQI (US)
73AQI (US)
80AQI (US)
89AQI (US)
118AQI (US)
78AQI (US)
69AQI (US)
68AQI (US)
41AQI (US)
64AQI (US)
61AQI (US)
69AQI (US)
71AQI (US)
80AQI (US)
89AQI (US)
56AQI (US)
84AQI (US)
74AQI (US)
56AQI (US)
47AQI (US)
61AQI (US)
51AQI (US)
32AQI (US)
32AQI (US)
58AQI (US)
35AQI (US)
25AQI (US)
37AQI (US)
42AQI (US)
31AQI (US)
50AQI (US)
47AQI (US)
41AQI (US)
35AQI (US)
32AQI (US)
48AQI (US)
71AQI (US)
58AQI (US)
54AQI (US)
38AQI (US)
30AQI (US)
44AQI (US)
36AQI (US)
44AQI (US)
42AQI (US)
51AQI (US)
37AQI (US)
34AQI (US)
44AQI (US)
58AQI (US)
60AQI (US)
40AQI (US)
41AQI (US)
42AQI (US)
38AQI (US)
23AQI (US)
25AQI (US)
27AQI (US)
14AQI (US)
27AQI (US)
35AQI (US)
36AQI (US)
33AQI (US)
109AQI (US)
86AQI (US)
86AQI (US)
61AQI (US)
41AQI (US)
35AQI (US)
No. of days
202676AQI (US)
Highest AQI (US) recorded in
January109AQI (US)
Lowest AQI (US) recorded in
June35AQI (US)
202551AQI (US)
Highest AQI (US) recorded in
December87AQI (US)
Lowest AQI (US) recorded in
August30AQI (US)
202452AQI (US)
Highest AQI (US) recorded in
January78AQI (US)
Lowest AQI (US) recorded in
September27AQI (US)
202367AQI (US)
Highest AQI (US) recorded in
November67AQI (US)
Lowest AQI (US) recorded in
December67AQI (US)
202282AQI (US)
Highest AQI (US) recorded in
December95AQI (US)
Lowest AQI (US) recorded in
October63AQI (US)
Most & Least Polluted Years Over the Last 5 Years
Strada Observatorului's annual 2026 AQI (US) (76) shows an average percentage change of 25.3% (worsened AQI (US)) compared to previous years: 2022 (82), 2023 (67), 2024 (52), 2025 (51).