Kumagaya, Saitama, 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
Kumagaya, Saitama, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (12th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 54 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 13th Oct - 14th Oct 2025
Kumagaya, Saitama, Japan
5 AM13th Oct 2025
5 PM
4 AM14th Oct 2025
AQI
AQI
76AQI
58AQI
In the last 24 hours,
Kumagaya's AQI reached its highest point of 76 at 1 PM during the Night, while the lowest point, undefined, was recorded at 4 AM during the Night between 13th Oct and 14th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Kumagaya, Saitama, Japan
28°C24/33°C
29°C26/32°C
29°C26/34°C
31°C26/36°C
29°C23/36°C
22°C21/23°C
23°C21/24°C
25°C22/31°C
23°C20/26°C
23°C20/26°C
23°C20/27°C
25°C21/30°C
27°C23/32°C
26°C23/29°C
25°C23/27°C
27°C23/34°C
24°C22/27°C
20°C19/20°C
22°C18/28°C
23°C20/26°C
23°C21/24°C
24°C20/28°C
25°C20/30°C
20°C20/21°C
24°C20/29°C
21°C18/22°C
21°C18/24°C
19°C18/20°C
22°C17/26°C
--°C/°C
--°C/°C
44AQI
42AQI
47AQI
45AQI
2025 Days Vs Air Quality
Kumagaya, Saitama, Japan
81%
231
19%
54
Total number of days with different AQI categories in last 286 days in 2025 (79 days remaining)
Under WHO’s Safe Air Quality Limits: 81%
Health Risk Level:
Low
In 2025, 81% of 286 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
Kumagaya, Saitama, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
30AQI
29AQI
26AQI
27AQI
37AQI
51AQI
33AQI
36AQI
29AQI
27AQI
26AQI
38AQI
29AQI
34AQI
33AQI
33AQI
30AQI
35AQI
45AQI
44AQI
47AQI
40AQI
48AQI
51AQI
39AQI
38AQI
40AQI
45AQI
34AQI
35AQI
31AQI
42AQI
45AQI
45AQI
38AQI
36AQI
30AQI
33AQI
31AQI
30AQI
29AQI
31AQI
40AQI
34AQI
34AQI
31AQI
41AQI
37AQI
33AQI
31AQI
31AQI
32AQI
32AQI
33AQI
33AQI
36AQI
39AQI
44AQI
54AQI
54AQI
59AQI
41AQI
39AQI
28AQI
34AQI
33AQI
43AQI
38AQI
41AQI
48AQI
53AQI
53AQI
43AQI
45AQI
27AQI
24AQI
27AQI
19AQI
27AQI
39AQI
49AQI
57AQI
63AQI
75AQI
76AQI
74AQI
60AQI
37AQI
41AQI
33AQI
35AQI
22AQI
25AQI
22AQI
32AQI
27AQI
34AQI
41AQI
30AQI
49AQI
43AQI
45AQI
32AQI
30AQI
25AQI
28AQI
45AQI
55AQI
69AQI
64AQI
48AQI
56AQI
36AQI
47AQI
44AQI
53AQI
51AQI
56AQI
40AQI
51AQI
46AQI
34AQI
34AQI
38AQI
36AQI
33AQI
27AQI
34AQI
35AQI
25AQI
23AQI
24AQI
37AQI
42AQI
43AQI
49AQI
33AQI
45AQI
47AQI
59AQI
67AQI
57AQI
53AQI
50AQI
35AQI
34AQI
32AQI
31AQI
37AQI
32AQI
24AQI
24AQI
34AQI
36AQI
29AQI
41AQI
46AQI
53AQI
64AQI
57AQI
42AQI
36AQI
43AQI
49AQI
42AQI
31AQI
37AQI
47AQI
44AQI
47AQI
47AQI
42AQI
35AQI
35AQI
34AQI
28AQI
30AQI
35AQI
35AQI
40AQI
44AQI
46AQI
46AQI
49AQI
49AQI
51AQI
55AQI
72AQI
75AQI
77AQI
63AQI
52AQI
54AQI
55AQI
46AQI
43AQI
45AQI
43AQI
41AQI
38AQI
38AQI
41AQI
42AQI
46AQI
47AQI
47AQI
48AQI
45AQI
46AQI
45AQI
37AQI
38AQI
34AQI
39AQI
43AQI
56AQI
49AQI
48AQI
40AQI
38AQI
40AQI
38AQI
37AQI
33AQI
32AQI
31AQI
33AQI
34AQI
38AQI
40AQI
43AQI
47AQI
47AQI
47AQI
47AQI
53AQI
55AQI
53AQI
49AQI
46AQI
49AQI
52AQI
51AQI
43AQI
37AQI
35AQI
33AQI
27AQI
27AQI
30AQI
33AQI
37AQI
34AQI
29AQI
29AQI
26AQI
30AQI
33AQI
41AQI
44AQI
39AQI
32AQI
31AQI
26AQI
28AQI
29AQI
30AQI
44AQI
57AQI
42AQI
45AQI
32AQI
26AQI
34AQI
43AQI
57AQI
70AQI
59AQI
58AQI
60AQI
63AQI
60AQI
56AQI
63AQI
54AQI
36AQI
36AQI
45AQI
41AQI
39AQI
40AQI
49AQI
43AQI
34AQI
56AQI
No. of days
202541AQI
Highest AQI recorded in
October56AQI
Lowest AQI recorded in
September34AQI
202440AQI
Highest AQI recorded in
April53AQI
Lowest AQI recorded in
August32AQI
202343AQI
Highest AQI recorded in
April52AQI
Lowest AQI recorded in
August30AQI
202241AQI
Highest AQI recorded in
April49AQI
Lowest AQI recorded in
December32AQI
202139AQI
Highest AQI recorded in
March47AQI
Lowest AQI recorded in
August33AQI
202038AQI
Highest AQI recorded in
November46AQI
Lowest AQI recorded in
September27AQI
Most & Least Polluted Years Over the Last 6 Years
Kumagaya's annual 2025 AQI (41) shows an average percentage change of 2.06% (worsened AQI) compared to previous years: 2020 (38), 2021 (39), 2022 (41), 2023 (43), 2024 (40).