Kladno, Stredocesky 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
Kladno, Stredocesky Kraj, Czechia
AQI Trends: Highest and Lowest
Same Day Analysis (22nd September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 4th highest AQI at 28 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: 22nd Sep - 23rd Sep 2025
Kladno, Stredocesky Kraj, Czechia
6 AM22nd Sep 2025
7 PM
5 AM23rd Sep 2025
31AQI
19AQI
29AQI
13AQI
In the last 24 hours,
Kladno's AQI reached its highest point of 31 at 6 AM during the Day, while the lowest point, 13, was recorded at 3 AM during the Night between 22nd Sep and 23rd Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Kladno, Stredocesky Kraj, Czechia
13°C7/20°C
16°C8/24°C
18°C10/26°C
20°C14/28°C
21°C15/31°C
19°C16/23°C
18°C14/23°C
18°C12/25°C
20°C13/27°C
17°C15/21°C
18°C12/24°C
21°C15/27°C
17°C13/20°C
16°C13/21°C
16°C11/21°C
16°C11/22°C
17°C12/23°C
17°C13/21°C
16°C11/22°C
15°C12/19°C
15°C11/21°C
14°C11/17°C
16°C10/22°C
15°C12/18°C
14°C11/18°C
17°C11/24°C
19°C14/26°C
20°C13/28°C
21°C15/28°C
12°C10/13°C
--°C/°C
32AQI
22AQI
25AQI
22AQI
2025 Days Vs Air Quality
Kladno, Stredocesky Kraj, Czechia
72%
192
23%
60
5%
12
0.3%
1
Total number of days with different AQI categories in last 266 days in 2025 (99 days remaining)
Under WHO’s Safe Air Quality Limits: 72%
Health Risk Level:
Low
In 2025, 72% of 266 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
Kladno, Stredocesky Kraj, Czechia
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
57AQI
30AQI
29AQI
32AQI
60AQI
81AQI
37AQI
25AQI
24AQI
25AQI
25AQI
32AQI
38AQI
62AQI
45AQI
45AQI
52AQI
74AQI
64AQI
63AQI
74AQI
72AQI
54AQI
43AQI
64AQI
51AQI
44AQI
40AQI
29AQI
61AQI
44AQI
45AQI
61AQI
77AQI
92AQI
98AQI
53AQI
61AQI
95AQI
98AQI
110AQI
115AQI
96AQI
74AQI
97AQI
53AQI
85AQI
87AQI
80AQI
109AQI
104AQI
129AQI
106AQI
157AQI
114AQI
150AQI
77AQI
37AQI
35AQI
45AQI
50AQI
61AQI
77AQI
77AQI
98AQI
118AQI
120AQI
114AQI
113AQI
65AQI
69AQI
57AQI
67AQI
60AQI
56AQI
45AQI
47AQI
55AQI
71AQI
76AQI
66AQI
63AQI
80AQI
77AQI
71AQI
45AQI
66AQI
83AQI
35AQI
28AQI
41AQI
47AQI
54AQI
49AQI
49AQI
24AQI
22AQI
31AQI
40AQI
42AQI
33AQI
38AQI
43AQI
52AQI
39AQI
50AQI
48AQI
33AQI
19AQI
39AQI
33AQI
27AQI
23AQI
31AQI
27AQI
40AQI
33AQI
39AQI
41AQI
45AQI
67AQI
49AQI
43AQI
28AQI
27AQI
28AQI
33AQI
29AQI
33AQI
32AQI
31AQI
32AQI
39AQI
40AQI
38AQI
21AQI
23AQI
17AQI
22AQI
31AQI
36AQI
33AQI
27AQI
28AQI
25AQI
27AQI
28AQI
20AQI
18AQI
19AQI
29AQI
33AQI
26AQI
35AQI
29AQI
25AQI
17AQI
15AQI
20AQI
21AQI
39AQI
42AQI
48AQI
51AQI
39AQI
47AQI
37AQI
37AQI
44AQI
52AQI
43AQI
40AQI
39AQI
43AQI
38AQI
31AQI
37AQI
34AQI
30AQI
29AQI
29AQI
32AQI
38AQI
38AQI
35AQI
36AQI
39AQI
32AQI
24AQI
23AQI
24AQI
23AQI
22AQI
25AQI
32AQI
33AQI
35AQI
25AQI
24AQI
27AQI
42AQI
46AQI
29AQI
20AQI
23AQI
29AQI
35AQI
33AQI
32AQI
31AQI
26AQI
22AQI
23AQI
25AQI
22AQI
22AQI
25AQI
23AQI
27AQI
36AQI
46AQI
57AQI
44AQI
41AQI
50AQI
59AQI
62AQI
62AQI
51AQI
32AQI
29AQI
36AQI
43AQI
35AQI
23AQI
18AQI
20AQI
27AQI
36AQI
48AQI
29AQI
24AQI
21AQI
22AQI
24AQI
22AQI
23AQI
23AQI
19AQI
22AQI
24AQI
31AQI
36AQI
26AQI
21AQI
19AQI
21AQI
18AQI
16AQI
17AQI
19AQI
22AQI
24AQI
38AQI
28AQI
48AQI
89AQI
70AQI
38AQI
31AQI
35AQI
30AQI
35AQI
23AQI
No. of days
202545AQI
Highest AQI recorded in
February89AQI
Lowest AQI recorded in
September23AQI
202448AQI
Highest AQI recorded in
January66AQI
Lowest AQI recorded in
February39AQI
202343AQI
Highest AQI recorded in
February52AQI
Lowest AQI recorded in
November29AQI
202248AQI
Highest AQI recorded in
March71AQI
Lowest AQI recorded in
August32AQI
202144AQI
Highest AQI recorded in
October60AQI
Lowest AQI recorded in
August32AQI
202043AQI
Highest AQI recorded in
December73AQI
Lowest AQI recorded in
October35AQI
Most & Least Polluted Years Over the Last 6 Years
Kladno's annual 2025 AQI (45) shows an average percentage change of -1.04% (improved AQI) compared to previous years: 2020 (43), 2021 (44), 2022 (48), 2023 (43), 2024 (48).