Brno-jih, Brno, Jihomoravsky kraj, Czechia Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
October Air Quality Analysis
Brno-jih, Brno, Jihomoravsky kraj, Czechia
AQI Trends: Highest and Lowest
Same Day Analysis (4th October ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 74 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 4th Oct - 5th Oct 2025
Brno-jih, Brno, Jihomoravsky kraj, Czechia
6 AM4th Oct 2025
6 PM
5 AM5th Oct 2025
84AQI
64AQI
69AQI
48AQI
In the last 24 hours,
Brno-jih's AQI reached its highest point of 84 at 8 AM during the Day, while the lowest point, 48, was recorded at 5 AM during the Night between 4th Oct and 5th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Brno-jih, Brno, Jihomoravsky kraj, Czechia
18°C14/23°C
16°C12/21°C
16°C10/23°C
17°C10/24°C
18°C12/25°C
17°C15/20°C
18°C14/24°C
16°C13/19°C
16°C12/22°C
15°C9/18°C
15°C8/22°C
15°C10/19°C
14°C10/19°C
14°C8/22°C
19°C12/26°C
20°C14/27°C
20°C13/28°C
19°C13/26°C
12°C10/14°C
10°C9/12°C
9°C7/10°C
10°C8/14°C
12°C9/18°C
12°C7/18°C
9°C5/14°C
8°C4/13°C
7°C4/10°C
7°C2/13°C
6°C1/13°C
7°C1/13°C
--°C/°C
33AQI
30AQI
33AQI
30AQI
2025 Days Vs Air Quality
Brno-jih, Brno, Jihomoravsky kraj, Czechia
92%
119
8%
10
Total number of days with different AQI categories in last 278 days in 2025 (87 days remaining)
Under WHO’s Safe Air Quality Limits: 92%
Health Risk Level:
Very Low
In 2025, 92% of 278 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
Brno-jih, Brno, Jihomoravsky kraj, Czechia
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
18AQI
25AQI
36AQI
31AQI
37AQI
42AQI
37AQI
27AQI
24AQI
16AQI
16AQI
17AQI
28AQI
41AQI
39AQI
37AQI
30AQI
36AQI
40AQI
35AQI
39AQI
45AQI
36AQI
31AQI
26AQI
35AQI
35AQI
33AQI
32AQI
31AQI
28AQI
28AQI
28AQI
28AQI
27AQI
33AQI
36AQI
31AQI
33AQI
33AQI
27AQI
23AQI
21AQI
20AQI
23AQI
25AQI
28AQI
28AQI
32AQI
27AQI
28AQI
27AQI
32AQI
44AQI
36AQI
29AQI
34AQI
39AQI
45AQI
48AQI
50AQI
44AQI
35AQI
29AQI
28AQI
33AQI
27AQI
33AQI
34AQI
29AQI
29AQI
41AQI
47AQI
54AQI
53AQI
52AQI
50AQI
54AQI
58AQI
61AQI
55AQI
37AQI
28AQI
32AQI
41AQI
40AQI
27AQI
18AQI
18AQI
24AQI
34AQI
44AQI
44AQI
30AQI
25AQI
31AQI
34AQI
30AQI
27AQI
26AQI
20AQI
20AQI
26AQI
31AQI
35AQI
25AQI
23AQI
23AQI
27AQI
20AQI
20AQI
19AQI
22AQI
28AQI
30AQI
28AQI
28AQI
23AQI
23AQI
22AQI
28AQI
31AQI
30AQI
38AQI
44AQI
47AQI
54AQI
64AQI
74AQI
26AQI
32AQI
32AQI
38AQI
27AQI
60AQI
No. of days
202533AQI
Highest AQI recorded in
October60AQI
Lowest AQI recorded in
May26AQI
Most & Least Polluted Years Over the Last 1 Years
Brno-jih's annual 2025 AQI (33) shows an average percentage change of NaN% (improved AQI) compared to previous years: .