Bologna, Emilia Romagna, Italy 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
Bologna, Emilia Romagna, Italy
AQI Trends: Highest and Lowest
Same Day Analysis (21st October ):
On this day, AQI across the 3 years varied significantly: 2025 ranks 1st highest AQI at 81 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 21st Oct - 22nd Oct 2025
Bologna, Emilia Romagna, Italy
7 AM21st Oct 2025
6 PM
6 AM22nd Oct 2025
78AQI
63AQI
105AQI
70AQI
In the last 24 hours,
Bologna's AQI reached its highest point of 105 at 12 AM during the Night, while the lowest point, 63, was recorded at 5 PM during the Day between 21st Oct and 22nd Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Bologna, Emilia Romagna, Italy
21°C17/26°C
20°C17/24°C
18°C13/25°C
15°C12/22°C
16°C11/22°C
15°C12/23°C
15°C12/20°C
17°C12/23°C
17°C13/23°C
14°C11/16°C
12°C9/16°C
13°C9/18°C
15°C9/21°C
13°C9/14°C
13°C8/19°C
15°C10/20°C
16°C11/21°C
17°C12/22°C
17°C12/22°C
17°C13/23°C
17°C13/23°C
17°C13/21°C
17°C13/20°C
15°C12/20°C
14°C10/19°C
13°C9/19°C
13°C9/19°C
13°C9/18°C
14°C11/18°C
14°C12/15°C
--°C/°C
72AQI
54AQI
71AQI
58AQI
2025 Days Vs Air Quality
Bologna, Emilia Romagna, Italy
63%
185
33%
98
3%
10
0.3%
1
Total number of days with different AQI categories in last 295 days in 2025 (70 days remaining)
Under WHO’s Safe Air Quality Limits: 63%
Health Risk Level:
Moderate
In 2025, 63% of 295 days were within WHO’s safe air quality limits, and 37% exceeded them. The risk of health issues is Moderate, particularly for individuals with respiratory or heart conditions.
Annual Air Quality Insights
Bologna, Emilia Romagna, Italy
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
113AQI
116AQI
118AQI
114AQI
108AQI
100AQI
93AQI
97AQI
70AQI
47AQI
45AQI
45AQI
39AQI
42AQI
49AQI
42AQI
47AQI
75AQI
69AQI
57AQI
62AQI
67AQI
59AQI
58AQI
60AQI
53AQI
54AQI
46AQI
43AQI
45AQI
45AQI
39AQI
42AQI
50AQI
52AQI
52AQI
51AQI
55AQI
59AQI
62AQI
77AQI
78AQI
62AQI
57AQI
48AQI
50AQI
53AQI
55AQI
56AQI
57AQI
58AQI
71AQI
76AQI
98AQI
130AQI
149AQI
159AQI
144AQI
75AQI
41AQI
47AQI
53AQI
48AQI
51AQI
56AQI
59AQI
57AQI
57AQI
56AQI
55AQI
48AQI
38AQI
46AQI
50AQI
34AQI
35AQI
35AQI
38AQI
45AQI
49AQI
52AQI
44AQI
45AQI
41AQI
39AQI
41AQI
36AQI
42AQI
32AQI
29AQI
32AQI
34AQI
38AQI
43AQI
42AQI
37AQI
30AQI
38AQI
38AQI
43AQI
50AQI
47AQI
50AQI
44AQI
45AQI
41AQI
39AQI
31AQI
28AQI
29AQI
28AQI
32AQI
34AQI
31AQI
23AQI
20AQI
23AQI
30AQI
33AQI
33AQI
44AQI
50AQI
47AQI
40AQI
32AQI
22AQI
24AQI
27AQI
30AQI
34AQI
38AQI
33AQI
33AQI
33AQI
35AQI
26AQI
33AQI
30AQI
33AQI
39AQI
39AQI
29AQI
21AQI
26AQI
29AQI
36AQI
36AQI
37AQI
33AQI
31AQI
35AQI
35AQI
35AQI
35AQI
42AQI
46AQI
49AQI
49AQI
51AQI
59AQI
63AQI
68AQI
70AQI
69AQI
70AQI
65AQI
60AQI
48AQI
53AQI
56AQI
59AQI
65AQI
70AQI
52AQI
56AQI
58AQI
57AQI
52AQI
50AQI
49AQI
51AQI
53AQI
50AQI
48AQI
53AQI
51AQI
54AQI
38AQI
27AQI
28AQI
31AQI
32AQI
32AQI
34AQI
35AQI
38AQI
42AQI
39AQI
31AQI
34AQI
41AQI
37AQI
28AQI
26AQI
23AQI
23AQI
25AQI
23AQI
21AQI
21AQI
21AQI
25AQI
34AQI
34AQI
35AQI
34AQI
36AQI
36AQI
32AQI
42AQI
52AQI
60AQI
57AQI
58AQI
58AQI
58AQI
56AQI
52AQI
53AQI
52AQI
52AQI
49AQI
43AQI
37AQI
33AQI
29AQI
29AQI
30AQI
37AQI
41AQI
35AQI
33AQI
24AQI
22AQI
21AQI
22AQI
22AQI
27AQI
28AQI
25AQI
30AQI
35AQI
36AQI
28AQI
24AQI
23AQI
23AQI
24AQI
25AQI
23AQI
29AQI
33AQI
45AQI
41AQI
34AQI
31AQI
20AQI
17AQI
30AQI
29AQI
39AQI
58AQI
58AQI
52AQI
60AQI
61AQI
79AQI
84AQI
64AQI
73AQI
90AQI
86AQI
83AQI
102AQI
102AQI
82AQI
85AQI
73AQI
68AQI
75AQI
87AQI
92AQI
96AQI
81AQI
67AQI
72AQI
45AQI
36AQI
33AQI
55AQI
34AQI
42AQI
30AQI
80AQI
No. of days
202548AQI
Highest AQI recorded in
October80AQI
Lowest AQI recorded in
September30AQI
202442AQI
Highest AQI recorded in
November60AQI
Lowest AQI recorded in
May28AQI
202361AQI
Highest AQI recorded in
December76AQI
Lowest AQI recorded in
November29AQI
202260AQI
Highest AQI recorded in
January87AQI
Lowest AQI recorded in
April40AQI
202153AQI
Highest AQI recorded in
December83AQI
Lowest AQI recorded in
April37AQI
202047AQI
Highest AQI recorded in
November74AQI
Lowest AQI recorded in
June35AQI
Most & Least Polluted Years Over the Last 6 Years
Bologna's annual 2025 AQI (48) shows an average percentage change of -6.6% (improved AQI) compared to previous years: 2020 (47), 2021 (53), 2022 (60), 2023 (61), 2024 (42).