Rijeka, Primorsko Goranska Zupanija, Croatia 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
Rijeka, Primorsko Goranska Zupanija, Croatia
AQI Trends: Highest and Lowest
Same Day Analysis (21st September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 4th highest AQI at 25 of Good air quality, showing improvement over 2024, 2023 and 2022 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 21st Sep - 22nd Sep 2025
Rijeka, Primorsko Goranska Zupanija, Croatia
6 AM21st Sep 2025
7 PM
5 AM22nd Sep 2025
25AQI
22AQI
27AQI
20AQI
In the last 24 hours,
Rijeka's AQI reached its highest point of 27 at 11 PM during the Night, while the lowest point, 20, was recorded at 5 AM during the Night between 21st Sep and 22nd Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Rijeka, Primorsko Goranska Zupanija, Croatia
19°C16/23°C
18°C15/23°C
18°C13/23°C
19°C15/23°C
20°C16/24°C
22°C17/25°C
20°C18/22°C
18°C17/19°C
18°C15/22°C
18°C15/21°C
19°C16/23°C
20°C16/23°C
21°C16/27°C
21°C18/25°C
19°C17/24°C
19°C15/24°C
19°C15/24°C
20°C16/22°C
18°C16/21°C
18°C16/22°C
19°C16/23°C
20°C17/23°C
18°C15/21°C
19°C15/23°C
18°C15/22°C
17°C13/22°C
19°C14/23°C
22°C17/27°C
21°C17/26°C
19°C16/23°C
--°C/°C
26AQI
24AQI
27AQI
24AQI
2025 Days Vs Air Quality
Rijeka, Primorsko Goranska Zupanija, Croatia
83%
218
17%
46
Total number of days with different AQI categories in last 265 days in 2025 (100 days remaining)
Under WHO’s Safe Air Quality Limits: 83%
Health Risk Level:
Low
In 2025, 83% of 265 days were within WHO’s safe air quality limits. The risk of health issues is Low, but the long-term effects, especially on vulnerable individuals, remain uncertain.
Annual Air Quality Insights
Rijeka, Primorsko Goranska Zupanija, Croatia
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
75AQI
64AQI
48AQI
41AQI
44AQI
44AQI
49AQI
43AQI
41AQI
40AQI
32AQI
29AQI
33AQI
35AQI
31AQI
31AQI
34AQI
35AQI
39AQI
55AQI
61AQI
61AQI
48AQI
46AQI
53AQI
50AQI
48AQI
49AQI
41AQI
41AQI
44AQI
37AQI
43AQI
52AQI
50AQI
43AQI
48AQI
63AQI
59AQI
56AQI
63AQI
74AQI
68AQI
56AQI
48AQI
51AQI
53AQI
56AQI
54AQI
56AQI
58AQI
59AQI
71AQI
62AQI
62AQI
75AQI
61AQI
53AQI
47AQI
45AQI
48AQI
49AQI
44AQI
44AQI
50AQI
48AQI
55AQI
64AQI
63AQI
58AQI
48AQI
37AQI
40AQI
35AQI
27AQI
29AQI
28AQI
32AQI
39AQI
43AQI
41AQI
43AQI
39AQI
37AQI
35AQI
38AQI
32AQI
27AQI
22AQI
25AQI
31AQI
35AQI
36AQI
35AQI
36AQI
31AQI
25AQI
24AQI
27AQI
28AQI
32AQI
31AQI
30AQI
27AQI
29AQI
34AQI
32AQI
23AQI
20AQI
18AQI
23AQI
31AQI
26AQI
30AQI
18AQI
16AQI
21AQI
27AQI
33AQI
29AQI
37AQI
41AQI
42AQI
37AQI
35AQI
21AQI
24AQI
24AQI
24AQI
27AQI
27AQI
30AQI
28AQI
29AQI
30AQI
24AQI
24AQI
23AQI
28AQI
31AQI
33AQI
31AQI
21AQI
23AQI
24AQI
27AQI
26AQI
26AQI
23AQI
20AQI
23AQI
27AQI
29AQI
29AQI
30AQI
29AQI
34AQI
41AQI
43AQI
45AQI
53AQI
61AQI
60AQI
55AQI
51AQI
54AQI
54AQI
41AQI
41AQI
46AQI
48AQI
40AQI
37AQI
43AQI
43AQI
46AQI
52AQI
47AQI
39AQI
34AQI
34AQI
34AQI
33AQI
35AQI
39AQI
36AQI
44AQI
40AQI
33AQI
29AQI
26AQI
25AQI
25AQI
29AQI
31AQI
30AQI
33AQI
36AQI
28AQI
27AQI
32AQI
36AQI
34AQI
30AQI
31AQI
30AQI
33AQI
30AQI
26AQI
25AQI
22AQI
24AQI
26AQI
25AQI
28AQI
33AQI
29AQI
26AQI
25AQI
30AQI
36AQI
44AQI
53AQI
54AQI
52AQI
53AQI
52AQI
51AQI
51AQI
45AQI
37AQI
39AQI
38AQI
36AQI
33AQI
25AQI
23AQI
25AQI
31AQI
34AQI
35AQI
32AQI
26AQI
23AQI
21AQI
21AQI
23AQI
27AQI
22AQI
21AQI
28AQI
33AQI
33AQI
28AQI
23AQI
22AQI
21AQI
23AQI
22AQI
18AQI
18AQI
20AQI
25AQI
25AQI
45AQI
56AQI
41AQI
28AQI
28AQI
43AQI
31AQI
36AQI
24AQI
No. of days
202537AQI
Highest AQI recorded in
February56AQI
Lowest AQI recorded in
September24AQI
202434AQI
Highest AQI recorded in
November47AQI
Lowest AQI recorded in
May26AQI
202330AQI
Highest AQI recorded in
February43AQI
Lowest AQI recorded in
January22AQI
202237AQI
Highest AQI recorded in
March60AQI
Lowest AQI recorded in
November21AQI
202127AQI
Highest AQI recorded in
June35AQI
Lowest AQI recorded in
January17AQI
202023AQI
Highest AQI recorded in
March38AQI
Lowest AQI recorded in
October13AQI
Most & Least Polluted Years Over the Last 6 Years
Rijeka's annual 2025 AQI (37) shows an average percentage change of 26.3% (worsened AQI) compared to previous years: 2020 (23), 2021 (27), 2022 (37), 2023 (30), 2024 (34).