Biella, Piedmont, Italy Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
August Air Quality Analysis
Biella, Piedmont, Italy
AQI Trends: Highest and Lowest
Same Day Analysis (3rd August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 23 of Good air quality, showing improvement over 2024 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 3rd Aug - 4th Aug 2025
Biella, Piedmont, Italy
5 AM3rd Aug 2025
9 PM
4 AM4th Aug 2025
28AQI
20AQI
56AQI
20AQI
In the last 24 hours,
Biella's AQI reached its highest point of 56 at 4 AM during the Night, while the lowest point, 20, was recorded at 3 AM during the Night between 3rd Aug and 4th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Biella, Piedmont, Italy
20°C14/26°C
19°C15/23°C
17°C10/25°C
16°C8/22°C
15°C6/23°C
17°C9/24°C
18°C12/25°C
18°C10/23°C
16°C11/23°C
19°C11/27°C
22°C15/28°C
23°C18/27°C
21°C13/28°C
19°C12/27°C
19°C14/25°C
18°C12/23°C
18°C13/24°C
20°C13/27°C
19°C13/25°C
17°C12/22°C
15°C10/23°C
16°C10/22°C
18°C11/26°C
17°C11/25°C
17°C9/24°C
17°C10/23°C
18°C10/25°C
16°C10/23°C
15°C9/22°C
16°C8/24°C
--°C/°C
29AQI
25AQI
30AQI
28AQI
2025 Days Vs Air Quality
Biella, Piedmont, Italy
72%
155
28%
60
Total number of days with different AQI categories in last 216 days in 2025 (149 days remaining)
Under WHO’s Safe Air Quality Limits: 72%
Health Risk Level:
Low
In 2025, 72% of 216 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
Biella, Piedmont, Italy
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
63AQI
65AQI
54AQI
57AQI
56AQI
63AQI
50AQI
46AQI
48AQI
42AQI
41AQI
42AQI
47AQI
61AQI
63AQI
60AQI
53AQI
56AQI
62AQI
61AQI
60AQI
60AQI
55AQI
51AQI
53AQI
48AQI
45AQI
36AQI
36AQI
38AQI
41AQI
39AQI
44AQI
46AQI
53AQI
59AQI
60AQI
62AQI
64AQI
68AQI
64AQI
60AQI
55AQI
52AQI
47AQI
43AQI
56AQI
58AQI
62AQI
62AQI
62AQI
66AQI
61AQI
60AQI
58AQI
53AQI
44AQI
44AQI
41AQI
44AQI
48AQI
51AQI
50AQI
50AQI
55AQI
54AQI
55AQI
55AQI
55AQI
47AQI
47AQI
39AQI
34AQI
33AQI
32AQI
31AQI
30AQI
32AQI
40AQI
41AQI
37AQI
31AQI
32AQI
36AQI
51AQI
41AQI
45AQI
53AQI
37AQI
32AQI
30AQI
36AQI
38AQI
48AQI
53AQI
47AQI
37AQI
42AQI
49AQI
52AQI
49AQI
46AQI
39AQI
40AQI
30AQI
46AQI
29AQI
31AQI
37AQI
37AQI
35AQI
32AQI
31AQI
34AQI
31AQI
29AQI
32AQI
32AQI
34AQI
34AQI
40AQI
40AQI
40AQI
36AQI
29AQI
23AQI
26AQI
31AQI
35AQI
35AQI
32AQI
32AQI
27AQI
30AQI
29AQI
31AQI
30AQI
33AQI
37AQI
33AQI
33AQI
39AQI
36AQI
33AQI
28AQI
33AQI
32AQI
33AQI
36AQI
34AQI
34AQI
34AQI
33AQI
34AQI
39AQI
35AQI
38AQI
40AQI
45AQI
55AQI
59AQI
62AQI
63AQI
64AQI
67AQI
56AQI
47AQI
42AQI
41AQI
45AQI
51AQI
51AQI
51AQI
47AQI
48AQI
52AQI
52AQI
42AQI
40AQI
40AQI
45AQI
39AQI
31AQI
33AQI
38AQI
37AQI
39AQI
34AQI
24AQI
23AQI
25AQI
30AQI
33AQI
33AQI
34AQI
32AQI
34AQI
35AQI
33AQI
32AQI
33AQI
27AQI
25AQI
23AQI
23AQI
20AQI
21AQI
22AQI
22AQI
21AQI
21AQI
24AQI
27AQI
28AQI
23AQI
52AQI
55AQI
43AQI
38AQI
33AQI
47AQI
29AQI
26AQI
No. of days
202542AQI
Highest AQI recorded in
February55AQI
Lowest AQI recorded in
August26AQI
202441AQI
Highest AQI recorded in
January64AQI
Lowest AQI recorded in
June25AQI
202329AQI
Highest AQI recorded in
December65AQI
Lowest AQI recorded in
January15AQI
202226AQI
Highest AQI recorded in
July45AQI
Lowest AQI recorded in
January14AQI
202133AQI
Highest AQI recorded in
April56AQI
Lowest AQI recorded in
December14AQI
Most & Least Polluted Years Over the Last 5 Years
Biella's annual 2025 AQI (42) shows an average percentage change of 34.7% (worsened AQI) compared to previous years: 2021 (33), 2022 (26), 2023 (29), 2024 (41).