Hinodamachi, Chichibu, 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
Hinodamachi, Chichibu, Saitama, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (4th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 65 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 5th Oct - 6th Oct 2025
Hinodamachi, Chichibu, Saitama, Japan
5 AM5th Oct 2025
5 PM
4 AM6th Oct 2025
AQI
AQI
60AQI
32AQI
In the last 24 hours,
Hinodamachi's AQI reached its highest point of 60 at 6 AM during the Night, while the lowest point, undefined, was recorded at 4 AM during the Night between 5th Oct and 6th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Hinodamachi, Chichibu, Saitama, Japan
23°C18/28°C
24°C21/29°C
25°C21/30°C
24°C23/28°C
24°C22/27°C
22°C20/25°C
20°C19/21°C
22°C20/24°C
24°C21/29°C
23°C21/26°C
25°C22/29°C
25°C22/30°C
24°C20/32°C
18°C16/18°C
18°C17/18°C
21°C18/26°C
18°C15/21°C
17°C15/19°C
17°C15/21°C
20°C15/24°C
22°C19/26°C
19°C16/22°C
19°C16/22°C
21°C17/29°C
18°C16/20°C
16°C15/17°C
17°C14/22°C
17°C15/21°C
17°C15/19°C
--°C/°C
--°C/°C
37AQI
33AQI
39AQI
38AQI
2025 Days Vs Air Quality
Hinodamachi, Chichibu, Saitama, Japan
86%
238
14%
39
Total number of days with different AQI categories in last 278 days in 2025 (87 days remaining)
Under WHO’s Safe Air Quality Limits: 86%
Health Risk Level:
Low
In 2025, 86% of 278 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
Hinodamachi, Chichibu, Saitama, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
31AQI
30AQI
28AQI
26AQI
27AQI
39AQI
27AQI
31AQI
28AQI
26AQI
25AQI
30AQI
28AQI
28AQI
30AQI
28AQI
29AQI
30AQI
36AQI
35AQI
39AQI
37AQI
42AQI
49AQI
37AQI
35AQI
30AQI
35AQI
30AQI
32AQI
32AQI
40AQI
47AQI
46AQI
37AQI
36AQI
30AQI
32AQI
31AQI
30AQI
30AQI
31AQI
36AQI
32AQI
33AQI
32AQI
37AQI
37AQI
32AQI
31AQI
31AQI
32AQI
32AQI
32AQI
32AQI
35AQI
37AQI
42AQI
48AQI
51AQI
57AQI
41AQI
37AQI
29AQI
32AQI
32AQI
38AQI
36AQI
38AQI
45AQI
47AQI
50AQI
45AQI
39AQI
26AQI
24AQI
25AQI
22AQI
26AQI
37AQI
47AQI
56AQI
60AQI
73AQI
83AQI
74AQI
59AQI
37AQI
39AQI
32AQI
30AQI
22AQI
22AQI
22AQI
32AQI
30AQI
31AQI
39AQI
32AQI
46AQI
39AQI
45AQI
27AQI
33AQI
24AQI
31AQI
44AQI
56AQI
65AQI
66AQI
41AQI
55AQI
36AQI
40AQI
39AQI
46AQI
46AQI
54AQI
37AQI
47AQI
45AQI
32AQI
31AQI
37AQI
36AQI
32AQI
26AQI
35AQI
35AQI
27AQI
25AQI
26AQI
36AQI
45AQI
46AQI
52AQI
39AQI
47AQI
42AQI
60AQI
69AQI
60AQI
53AQI
49AQI
30AQI
32AQI
32AQI
30AQI
37AQI
27AQI
22AQI
20AQI
35AQI
30AQI
32AQI
39AQI
48AQI
53AQI
57AQI
55AQI
40AQI
36AQI
40AQI
45AQI
38AQI
33AQI
38AQI
44AQI
43AQI
49AQI
51AQI
47AQI
41AQI
39AQI
32AQI
28AQI
27AQI
34AQI
36AQI
44AQI
50AQI
53AQI
45AQI
51AQI
49AQI
53AQI
54AQI
68AQI
72AQI
75AQI
63AQI
46AQI
49AQI
50AQI
40AQI
35AQI
39AQI
34AQI
36AQI
35AQI
38AQI
41AQI
42AQI
45AQI
48AQI
46AQI
45AQI
44AQI
48AQI
47AQI
40AQI
41AQI
36AQI
41AQI
47AQI
57AQI
52AQI
48AQI
37AQI
37AQI
40AQI
39AQI
33AQI
36AQI
35AQI
40AQI
46AQI
45AQI
42AQI
44AQI
46AQI
48AQI
47AQI
47AQI
49AQI
54AQI
55AQI
55AQI
50AQI
48AQI
51AQI
52AQI
52AQI
43AQI
39AQI
36AQI
28AQI
25AQI
28AQI
31AQI
35AQI
40AQI
38AQI
32AQI
31AQI
37AQI
41AQI
38AQI
43AQI
47AQI
38AQI
32AQI
31AQI
25AQI
27AQI
29AQI
31AQI
41AQI
42AQI
41AQI
43AQI
32AQI
21AQI
25AQI
39AQI
49AQI
65AQI
32AQI
35AQI
43AQI
39AQI
39AQI
40AQI
47AQI
45AQI
35AQI
45AQI
No. of days
202540AQI
Highest AQI recorded in
July47AQI
Lowest AQI recorded in
January32AQI
202437AQI
Highest AQI recorded in
April53AQI
Lowest AQI recorded in
December28AQI
202340AQI
Highest AQI recorded in
April49AQI
Lowest AQI recorded in
August30AQI
202238AQI
Highest AQI recorded in
April47AQI
Lowest AQI recorded in
August28AQI
202137AQI
Highest AQI recorded in
June43AQI
Lowest AQI recorded in
August32AQI
202035AQI
Highest AQI recorded in
June44AQI
Lowest AQI recorded in
September22AQI
Most & Least Polluted Years Over the Last 6 Years
Hinodamachi's annual 2025 AQI (40) shows an average percentage change of 6.6% (worsened AQI) compared to previous years: 2020 (35), 2021 (37), 2022 (38), 2023 (40), 2024 (37).