Bochum, North Rhine Westphalia, Germany 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
Bochum, North Rhine Westphalia, Germany
AQI Trends: Highest and Lowest
Same Day Analysis (16th September ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 18 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 17th Sep - 18th Sep 2025
Bochum, North Rhine Westphalia, Germany
6 AM17th Sep 2025
8 PM
5 AM18th Sep 2025
AQI
AQI
22AQI
18AQI
In the last 24 hours,
Bochum's AQI reached its highest point of 22 at 11 AM during the Night, while the lowest point, undefined, was recorded at 5 AM during the Night between 17th Sep and 18th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Bochum, North Rhine Westphalia, Germany
23°C17/29°C
20°C15/25°C
19°C15/24°C
16°C13/19°C
16°C13/20°C
17°C13/21°C
18°C12/23°C
21°C15/29°C
21°C17/27°C
20°C16/25°C
19°C15/25°C
18°C14/23°C
19°C16/22°C
18°C16/22°C
18°C14/23°C
20°C16/24°C
20°C17/24°C
17°C13/22°C
19°C13/24°C
21°C16/27°C
18°C16/20°C
14°C11/15°C
16°C11/21°C
16°C14/20°C
15°C12/18°C
14°C12/18°C
15°C11/19°C
18°C15/21°C
15°C13/17°C
--°C/°C
--°C/°C
26AQI
22AQI
24AQI
23AQI
2025 Days Vs Air Quality
Bochum, North Rhine Westphalia, Germany
95%
106
5%
5
Total number of days with different AQI categories in last 260 days in 2025 (105 days remaining)
Under WHO’s Safe Air Quality Limits: 95%
Health Risk Level:
Very Low
In 2025, 95% of 260 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
Bochum, North Rhine Westphalia, Germany
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
21AQI
22AQI
31AQI
31AQI
37AQI
30AQI
39AQI
25AQI
18AQI
17AQI
17AQI
21AQI
45AQI
47AQI
39AQI
42AQI
51AQI
50AQI
36AQI
36AQI
40AQI
41AQI
32AQI
29AQI
29AQI
33AQI
27AQI
26AQI
26AQI
25AQI
28AQI
25AQI
26AQI
26AQI
31AQI
35AQI
28AQI
25AQI
23AQI
21AQI
21AQI
24AQI
28AQI
25AQI
23AQI
28AQI
39AQI
44AQI
31AQI
31AQI
34AQI
36AQI
34AQI
25AQI
20AQI
21AQI
26AQI
33AQI
32AQI
44AQI
33AQI
30AQI
28AQI
25AQI
25AQI
23AQI
22AQI
22AQI
24AQI
24AQI
27AQI
29AQI
36AQI
38AQI
42AQI
46AQI
55AQI
59AQI
61AQI
55AQI
43AQI
29AQI
29AQI
32AQI
34AQI
26AQI
24AQI
22AQI
22AQI
27AQI
34AQI
40AQI
29AQI
20AQI
19AQI
17AQI
17AQI
17AQI
19AQI
19AQI
21AQI
23AQI
25AQI
34AQI
32AQI
24AQI
18AQI
17AQI
17AQI
16AQI
18AQI
25AQI
32AQI
29AQI
33AQI
21AQI
No. of days
202530AQI
Highest AQI recorded in
August33AQI
Lowest AQI recorded in
September21AQI
Most & Least Polluted Years Over the Last 1 Years
Bochum's annual 2025 AQI (30) shows an average percentage change of NaN% (improved AQI) compared to previous years: .