Ostrava Ceskobratrsk, Ostrava, Moravskoslezsky Kraj, Czechia 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
Ostrava Ceskobratrsk, Ostrava, Moravskoslezsky Kraj, Czechia
AQI Trends: Highest and Lowest
Same Day Analysis (19th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 4th highest AQI at 26 of Good air quality, showing improvement over 2024, 2023 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 19th Sep - 20th Sep 2025
Ostrava Ceskobratrsk, Ostrava, Moravskoslezsky Kraj, Czechia
6 AM19th Sep 2025
7 PM
5 AM20th Sep 2025
29AQI
24AQI
40AQI
23AQI
In the last 24 hours,
Ostrava Ceskobratrsk's AQI reached its highest point of 40 at 3 AM during the Night, while the lowest point, 23, was recorded at 7 PM during the Night between 19th Sep and 20th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Ostrava Ceskobratrsk, Ostrava, Moravskoslezsky Kraj, Czechia
19°C14/24°C
17°C11/21°C
14°C10/18°C
13°C7/20°C
16°C10/22°C
16°C8/24°C
20°C13/28°C
24°C16/31°C
24°C18/31°C
20°C17/24°C
16°C14/18°C
20°C13/28°C
21°C16/28°C
19°C16/23°C
21°C15/27°C
21°C17/27°C
15°C12/18°C
15°C10/21°C
17°C11/24°C
17°C12/24°C
18°C15/25°C
18°C15/23°C
17°C13/21°C
17°C13/23°C
15°C12/16°C
15°C10/21°C
15°C11/19°C
13°C10/17°C
13°C9/18°C
19°C13/25°C
--°C/°C
38AQI
32AQI
38AQI
33AQI
2025 Days Vs Air Quality
Ostrava Ceskobratrsk, Ostrava, Moravskoslezsky Kraj, Czechia
66%
172
28%
73
5%
14
1%
3
Total number of days with different AQI categories in last 263 days in 2025 (102 days remaining)
Under WHO’s Safe Air Quality Limits: 66%
Health Risk Level:
Moderate
In 2025, 66% of 263 days were within WHO’s safe air quality limits, and 34% exceeded them. The risk of health issues is Moderate, particularly for individuals with respiratory or heart conditions.
Annual Air Quality Insights
Ostrava Ceskobratrsk, Ostrava, Moravskoslezsky Kraj, Czechia
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
73AQI
61AQI
45AQI
37AQI
96AQI
49AQI
54AQI
34AQI
35AQI
24AQI
23AQI
22AQI
43AQI
62AQI
67AQI
62AQI
53AQI
72AQI
68AQI
57AQI
62AQI
78AQI
66AQI
66AQI
56AQI
66AQI
55AQI
50AQI
30AQI
60AQI
64AQI
62AQI
85AQI
101AQI
114AQI
88AQI
79AQI
113AQI
110AQI
153AQI
153AQI
152AQI
135AQI
86AQI
98AQI
86AQI
99AQI
138AQI
117AQI
110AQI
112AQI
97AQI
77AQI
87AQI
112AQI
101AQI
121AQI
104AQI
75AQI
69AQI
58AQI
73AQI
91AQI
76AQI
78AQI
77AQI
96AQI
112AQI
91AQI
54AQI
50AQI
42AQI
56AQI
57AQI
69AQI
61AQI
54AQI
61AQI
66AQI
73AQI
95AQI
46AQI
61AQI
81AQI
95AQI
64AQI
74AQI
96AQI
80AQI
35AQI
69AQI
72AQI
55AQI
62AQI
50AQI
32AQI
27AQI
37AQI
43AQI
27AQI
50AQI
52AQI
52AQI
43AQI
32AQI
33AQI
43AQI
24AQI
19AQI
22AQI
33AQI
42AQI
38AQI
60AQI
51AQI
36AQI
31AQI
35AQI
33AQI
35AQI
37AQI
36AQI
36AQI
29AQI
25AQI
30AQI
35AQI
22AQI
30AQI
30AQI
30AQI
36AQI
43AQI
36AQI
25AQI
18AQI
19AQI
16AQI
16AQI
24AQI
29AQI
32AQI
19AQI
21AQI
21AQI
20AQI
21AQI
23AQI
20AQI
26AQI
33AQI
31AQI
33AQI
32AQI
37AQI
30AQI
25AQI
21AQI
22AQI
22AQI
32AQI
39AQI
41AQI
34AQI
40AQI
48AQI
48AQI
42AQI
44AQI
50AQI
38AQI
33AQI
29AQI
37AQI
34AQI
33AQI
31AQI
29AQI
26AQI
29AQI
28AQI
27AQI
27AQI
41AQI
37AQI
34AQI
36AQI
36AQI
36AQI
27AQI
23AQI
22AQI
23AQI
29AQI
31AQI
37AQI
38AQI
28AQI
30AQI
34AQI
39AQI
46AQI
26AQI
19AQI
26AQI
35AQI
53AQI
47AQI
34AQI
29AQI
28AQI
26AQI
26AQI
25AQI
27AQI
29AQI
33AQI
25AQI
26AQI
34AQI
50AQI
58AQI
49AQI
39AQI
46AQI
56AQI
61AQI
62AQI
53AQI
31AQI
29AQI
36AQI
46AQI
40AQI
25AQI
17AQI
20AQI
27AQI
40AQI
50AQI
47AQI
32AQI
30AQI
42AQI
46AQI
43AQI
40AQI
52AQI
29AQI
26AQI
38AQI
46AQI
50AQI
37AQI
34AQI
37AQI
36AQI
20AQI
21AQI
19AQI
25AQI
26AQI
55AQI
106AQI
71AQI
41AQI
27AQI
34AQI
32AQI
38AQI
35AQI
No. of days
202549AQI
Highest AQI recorded in
February106AQI
Lowest AQI recorded in
May27AQI
202453AQI
Highest AQI recorded in
December75AQI
Lowest AQI recorded in
May39AQI
202351AQI
Highest AQI recorded in
February66AQI
Lowest AQI recorded in
July40AQI
202263AQI
Highest AQI recorded in
March103AQI
Lowest AQI recorded in
August27AQI
202161AQI
Highest AQI recorded in
December82AQI
Lowest AQI recorded in
August39AQI
202056AQI
Highest AQI recorded in
December131AQI
Lowest AQI recorded in
July43AQI
Most & Least Polluted Years Over the Last 6 Years
Ostrava Ceskobratrsk's annual 2025 AQI (49) shows an average percentage change of -13.2% (improved AQI) compared to previous years: 2020 (56), 2021 (61), 2022 (63), 2023 (51), 2024 (53).