Koganei, Tokyo, Japan Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
November Air Quality Analysis
Koganei, Tokyo, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (7th November ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 35 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 8th Nov - 9th Nov 2025
Koganei, Tokyo, Japan
5 AM8th Nov 2025
4 PM
4 AM9th Nov 2025
AQI
AQI
55AQI
32AQI
In the last 24 hours,
Koganei's AQI reached its highest point of 55 at 2 PM during the Night, while the lowest point, 32, was recorded at 2 AM during the Night between 8th Nov and 9th Nov 2025.
Day & Night AQI Trend : Oct - Nov 2025
Koganei, Tokyo, Japan
21°C19/24°C
19°C18/20°C
21°C18/24°C
23°C21/25°C
19°C17/21°C
19°C16/20°C
20°C18/22°C
22°C19/25°C
23°C19/26°C
21°C18/23°C
19°C16/22°C
16°C15/16°C
13°C12/13°C
15°C13/18°C
16°C13/18°C
14°C14/15°C
16°C15/17°C
18°C17/19°C
17°C15/19°C
14°C13/15°C
16°C13/19°C
17°C14/19°C
19°C15/24°C
18°C16/20°C
16°C14/19°C
14°C11/16°C
15°C13/18°C
15°C15/16°C
16°C13/20°C
--°C/°C
--°C/°C
41AQI
37AQI
41AQI
37AQI
2025 Days Vs Air Quality
Koganei, Tokyo, Japan
87%
141
13%
22
Total number of days with different AQI categories in last 312 days in 2025 (53 days remaining)
Under WHO’s Safe Air Quality Limits: 87%
Health Risk Level:
Low
In 2025, 87% of 312 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
Koganei, Tokyo, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
32AQI
19AQI
15AQI
19AQI
25AQI
21AQI
23AQI
34AQI
38AQI
41AQI
48AQI
35AQI
32AQI
27AQI
33AQI
32AQI
27AQI
25AQI
29AQI
38AQI
32AQI
33AQI
34AQI
27AQI
19AQI
19AQI
17AQI
16AQI
16AQI
22AQI
22AQI
26AQI
34AQI
38AQI
45AQI
41AQI
44AQI
47AQI
54AQI
69AQI
75AQI
78AQI
63AQI
55AQI
56AQI
55AQI
47AQI
47AQI
46AQI
46AQI
42AQI
38AQI
37AQI
38AQI
37AQI
40AQI
41AQI
38AQI
37AQI
34AQI
37AQI
39AQI
32AQI
34AQI
33AQI
40AQI
44AQI
58AQI
52AQI
50AQI
45AQI
46AQI
47AQI
40AQI
39AQI
35AQI
33AQI
35AQI
34AQI
36AQI
40AQI
42AQI
46AQI
46AQI
49AQI
50AQI
48AQI
56AQI
56AQI
55AQI
50AQI
47AQI
50AQI
54AQI
53AQI
45AQI
38AQI
37AQI
33AQI
30AQI
29AQI
30AQI
37AQI
41AQI
37AQI
31AQI
32AQI
28AQI
35AQI
39AQI
37AQI
45AQI
44AQI
34AQI
33AQI
29AQI
30AQI
30AQI
30AQI
27AQI
42AQI
34AQI
28AQI
31AQI
27AQI
35AQI
40AQI
49AQI
58AQI
55AQI
47AQI
46AQI
51AQI
55AQI
48AQI
48AQI
37AQI
48AQI
52AQI
49AQI
50AQI
47AQI
45AQI
45AQI
26AQI
35AQI
29AQI
35AQI
38AQI
38AQI
30AQI
22AQI
31AQI
29AQI
57AQI
62AQI
25AQI
32AQI
38AQI
23AQI
42AQI
42AQI
35AQI
22AQI
28AQI
46AQI
45AQI
34AQI
43AQI
34AQI
No. of days
202539AQI
Highest AQI recorded in
July46AQI
Lowest AQI recorded in
May22AQI
Most & Least Polluted Years Over the Last 1 Years
Koganei's annual 2025 AQI (39) shows an average percentage change of NaN% (improved AQI) compared to previous years: .