Kubo, Kimitsu, Chiba, Japan 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
Kubo, Kimitsu, Chiba, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (11th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 50 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 11th Oct - 12th Oct 2025
Kubo, Kimitsu, Chiba, Japan
5 AM11th Oct 2025
5 PM
4 AM12th Oct 2025
AQI
AQI
55AQI
15AQI
In the last 24 hours,
Kubo's AQI reached its highest point of 55 at 4 AM during the Night, while the lowest point, 15, was recorded at 11 PM during the Night between 11th Oct and 12th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Kubo, Kimitsu, Chiba, Japan
25°C24/27°C
26°C24/28°C
27°C27/29°C
27°C25/29°C
27°C25/29°C
27°C26/29°C
27°C23/30°C
22°C20/23°C
24°C22/26°C
26°C22/29°C
23°C20/25°C
22°C19/25°C
22°C20/25°C
23°C21/26°C
25°C23/28°C
23°C22/25°C
24°C22/27°C
25°C23/28°C
23°C21/26°C
21°C19/21°C
22°C19/25°C
23°C21/25°C
23°C22/25°C
24°C21/26°C
24°C21/27°C
22°C21/23°C
22°C21/25°C
21°C19/22°C
20°C18/21°C
--°C/°C
--°C/°C
42AQI
36AQI
38AQI
38AQI
2025 Days Vs Air Quality
Kubo, Kimitsu, Chiba, Japan
89%
252
11%
32
Total number of days with different AQI categories in last 284 days in 2025 (81 days remaining)
Under WHO’s Safe Air Quality Limits: 89%
Health Risk Level:
Low
In 2025, 89% of 284 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
Kubo, Kimitsu, Chiba, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
30AQI
33AQI
26AQI
30AQI
29AQI
55AQI
29AQI
39AQI
29AQI
31AQI
28AQI
42AQI
30AQI
37AQI
38AQI
31AQI
29AQI
32AQI
55AQI
42AQI
45AQI
39AQI
50AQI
52AQI
41AQI
39AQI
36AQI
37AQI
33AQI
32AQI
30AQI
39AQI
32AQI
46AQI
30AQI
37AQI
30AQI
31AQI
31AQI
30AQI
32AQI
31AQI
32AQI
31AQI
30AQI
31AQI
36AQI
35AQI
31AQI
31AQI
30AQI
30AQI
31AQI
32AQI
32AQI
35AQI
36AQI
39AQI
47AQI
49AQI
60AQI
40AQI
40AQI
27AQI
33AQI
32AQI
34AQI
34AQI
34AQI
41AQI
51AQI
47AQI
44AQI
41AQI
29AQI
25AQI
25AQI
20AQI
27AQI
43AQI
48AQI
58AQI
58AQI
64AQI
85AQI
71AQI
54AQI
38AQI
49AQI
34AQI
32AQI
23AQI
22AQI
22AQI
25AQI
24AQI
31AQI
36AQI
32AQI
46AQI
37AQI
40AQI
26AQI
43AQI
29AQI
40AQI
44AQI
50AQI
57AQI
44AQI
45AQI
40AQI
31AQI
43AQI
35AQI
45AQI
46AQI
40AQI
39AQI
46AQI
39AQI
30AQI
31AQI
40AQI
34AQI
28AQI
25AQI
27AQI
29AQI
27AQI
32AQI
28AQI
36AQI
31AQI
37AQI
34AQI
29AQI
40AQI
43AQI
56AQI
35AQI
33AQI
37AQI
36AQI
28AQI
28AQI
27AQI
25AQI
30AQI
22AQI
17AQI
19AQI
27AQI
26AQI
27AQI
39AQI
44AQI
45AQI
52AQI
34AQI
29AQI
28AQI
40AQI
34AQI
31AQI
42AQI
38AQI
45AQI
44AQI
39AQI
33AQI
26AQI
19AQI
21AQI
21AQI
20AQI
20AQI
34AQI
32AQI
29AQI
34AQI
33AQI
35AQI
33AQI
35AQI
52AQI
70AQI
81AQI
78AQI
68AQI
51AQI
48AQI
52AQI
48AQI
39AQI
40AQI
37AQI
41AQI
34AQI
31AQI
30AQI
30AQI
28AQI
27AQI
28AQI
24AQI
24AQI
22AQI
23AQI
25AQI
29AQI
31AQI
33AQI
40AQI
43AQI
63AQI
50AQI
51AQI
50AQI
46AQI
50AQI
40AQI
39AQI
36AQI
33AQI
34AQI
35AQI
35AQI
39AQI
42AQI
45AQI
47AQI
49AQI
49AQI
47AQI
54AQI
55AQI
52AQI
50AQI
46AQI
51AQI
55AQI
52AQI
41AQI
35AQI
35AQI
40AQI
27AQI
27AQI
29AQI
36AQI
40AQI
34AQI
29AQI
28AQI
27AQI
32AQI
32AQI
31AQI
48AQI
48AQI
35AQI
36AQI
30AQI
28AQI
30AQI
32AQI
41AQI
56AQI
38AQI
39AQI
31AQI
25AQI
29AQI
43AQI
38AQI
46AQI
57AQI
47AQI
48AQI
58AQI
47AQI
49AQI
50AQI
36AQI
34AQI
43AQI
37AQI
32AQI
32AQI
40AQI
46AQI
35AQI
47AQI
No. of days
202538AQI
Highest AQI recorded in
October47AQI
Lowest AQI recorded in
May32AQI
202437AQI
Highest AQI recorded in
July49AQI
Lowest AQI recorded in
September29AQI
202338AQI
Highest AQI recorded in
April46AQI
Lowest AQI recorded in
September29AQI
202237AQI
Highest AQI recorded in
March44AQI
Lowest AQI recorded in
August24AQI
202135AQI
Highest AQI recorded in
May41AQI
Lowest AQI recorded in
July30AQI
202033AQI
Highest AQI recorded in
December38AQI
Lowest AQI recorded in
September25AQI
Most & Least Polluted Years Over the Last 6 Years
Kubo's annual 2025 AQI (38) shows an average percentage change of 5.1% (worsened AQI) compared to previous years: 2020 (33), 2021 (35), 2022 (37), 2023 (38), 2024 (37).