Bratislava, Bratislavsky kraj, Slovakia 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
Bratislava, Bratislavsky kraj, Slovakia
AQI Trends: Highest and Lowest
Same Day Analysis (19th September ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 24 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 20th Sep - 21st Sep 2025
Bratislava, Bratislavsky kraj, Slovakia
6 AM20th Sep 2025
7 PM
5 AM21st Sep 2025
AQI
AQI
42AQI
34AQI
In the last 24 hours,
Bratislava's AQI reached its highest point of 42 at 1 PM during the Night, while the lowest point, undefined, was recorded at 5 AM during the Night between 20th Sep and 21st Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Bratislava, Bratislavsky kraj, Slovakia
19°C14/24°C
16°C11/21°C
15°C9/21°C
18°C12/24°C
19°C13/27°C
22°C14/29°C
25°C17/33°C
25°C18/32°C
20°C16/26°C
17°C15/21°C
20°C14/27°C
20°C16/25°C
20°C16/26°C
22°C16/28°C
20°C15/24°C
18°C14/24°C
18°C11/25°C
19°C14/25°C
20°C14/26°C
18°C17/21°C
19°C15/24°C
18°C15/21°C
19°C15/24°C
16°C13/19°C
18°C12/26°C
16°C13/17°C
15°C11/20°C
16°C11/22°C
20°C14/27°C
--°C/°C
--°C/°C
32AQI
27AQI
30AQI
26AQI
2025 Days Vs Air Quality
Bratislava, Bratislavsky kraj, Slovakia
96%
109
4%
5
Total number of days with different AQI categories in last 263 days in 2025 (102 days remaining)
Under WHO’s Safe Air Quality Limits: 96%
Health Risk Level:
Very Low
In 2025, 96% of 263 days were within WHO’s safe air quality limits. The risk of health issues is Very Low, but health impacts are still unclear.
Annual Air Quality Insights
Bratislava, Bratislavsky kraj, Slovakia
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
26AQI
24AQI
31AQI
27AQI
32AQI
26AQI
32AQI
31AQI
30AQI
44AQI
18AQI
22AQI
27AQI
37AQI
30AQI
32AQI
27AQI
32AQI
33AQI
29AQI
34AQI
41AQI
37AQI
34AQI
32AQI
38AQI
35AQI
34AQI
35AQI
33AQI
28AQI
27AQI
29AQI
29AQI
31AQI
39AQI
38AQI
38AQI
40AQI
36AQI
28AQI
25AQI
22AQI
23AQI
22AQI
25AQI
28AQI
29AQI
31AQI
26AQI
22AQI
23AQI
27AQI
36AQI
26AQI
22AQI
25AQI
26AQI
31AQI
35AQI
33AQI
30AQI
26AQI
25AQI
25AQI
26AQI
24AQI
22AQI
24AQI
23AQI
26AQI
31AQI
40AQI
46AQI
51AQI
44AQI
45AQI
52AQI
56AQI
58AQI
56AQI
36AQI
36AQI
39AQI
47AQI
43AQI
29AQI
20AQI
18AQI
26AQI
33AQI
43AQI
45AQI
34AQI
25AQI
31AQI
32AQI
26AQI
32AQI
30AQI
21AQI
22AQI
30AQI
36AQI
41AQI
28AQI
25AQI
30AQI
30AQI
22AQI
23AQI
21AQI
22AQI
24AQI
27AQI
32AQI
29AQI
36AQI
28AQI
No. of days
202531AQI
Highest AQI recorded in
August36AQI
Lowest AQI recorded in
May27AQI
Most & Least Polluted Years Over the Last 1 Years
Bratislava's annual 2025 AQI (31) shows an average percentage change of NaN% (improved AQI) compared to previous years: .