Nakanojomachi, Gunma, Japan 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
Nakanojomachi, Gunma, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (29th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 43 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 30th Sep - 1st Oct 2025
Nakanojomachi, Gunma, Japan
5 AM30th Sep 2025
5 PM
4 AM1st Oct 2025
AQI
AQI
40AQI
13AQI
In the last 24 hours,
Nakanojomachi's AQI reached its highest point of 40 at 2 AM during the Night, while the lowest point, 13, was recorded at 7 AM during the Night between 30th Sep and 1st Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Nakanojomachi, Gunma, Japan
29°C23/35°C
28°C22/36°C
26°C21/34°C
22°C19/27°C
21°C18/23°C
23°C16/32°C
25°C18/32°C
25°C20/32°C
25°C21/32°C
23°C20/28°C
22°C18/28°C
20°C17/24°C
20°C18/25°C
23°C18/31°C
23°C19/29°C
24°C18/31°C
25°C19/34°C
22°C16/31°C
17°C15/20°C
17°C15/20°C
19°C14/25°C
17°C10/24°C
17°C14/23°C
17°C12/23°C
19°C12/27°C
22°C16/31°C
20°C14/27°C
19°C14/25°C
20°C14/29°C
--°C/°C
--°C/°C
35AQI
31AQI
36AQI
36AQI
2025 Days Vs Air Quality
Nakanojomachi, Gunma, Japan
85%
232
15%
40
Total number of days with different AQI categories in last 273 days in 2025 (92 days remaining)
Under WHO’s Safe Air Quality Limits: 85%
Health Risk Level:
Low
In 2025, 85% of 273 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
Nakanojomachi, Gunma, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
28AQI
30AQI
28AQI
24AQI
26AQI
33AQI
28AQI
27AQI
26AQI
27AQI
25AQI
25AQI
27AQI
28AQI
27AQI
25AQI
26AQI
26AQI
36AQI
34AQI
37AQI
33AQI
41AQI
38AQI
36AQI
30AQI
30AQI
31AQI
30AQI
29AQI
30AQI
35AQI
43AQI
39AQI
33AQI
33AQI
29AQI
30AQI
30AQI
29AQI
29AQI
30AQI
30AQI
31AQI
29AQI
30AQI
34AQI
36AQI
32AQI
31AQI
31AQI
31AQI
32AQI
32AQI
33AQI
35AQI
38AQI
45AQI
46AQI
49AQI
48AQI
39AQI
38AQI
26AQI
33AQI
32AQI
39AQI
37AQI
38AQI
42AQI
38AQI
47AQI
36AQI
39AQI
24AQI
21AQI
26AQI
19AQI
25AQI
37AQI
45AQI
56AQI
59AQI
68AQI
63AQI
63AQI
48AQI
40AQI
39AQI
37AQI
36AQI
31AQI
30AQI
30AQI
38AQI
36AQI
36AQI
42AQI
35AQI
46AQI
42AQI
45AQI
31AQI
33AQI
31AQI
31AQI
46AQI
51AQI
59AQI
53AQI
44AQI
51AQI
37AQI
42AQI
42AQI
50AQI
45AQI
51AQI
40AQI
49AQI
47AQI
37AQI
37AQI
36AQI
39AQI
35AQI
32AQI
37AQI
39AQI
31AQI
30AQI
33AQI
40AQI
46AQI
49AQI
52AQI
39AQI
43AQI
40AQI
53AQI
59AQI
56AQI
50AQI
46AQI
35AQI
34AQI
36AQI
35AQI
41AQI
35AQI
31AQI
28AQI
39AQI
36AQI
36AQI
39AQI
47AQI
51AQI
58AQI
56AQI
46AQI
39AQI
40AQI
47AQI
43AQI
34AQI
40AQI
45AQI
45AQI
48AQI
50AQI
53AQI
59AQI
49AQI
48AQI
44AQI
41AQI
46AQI
44AQI
49AQI
52AQI
55AQI
52AQI
54AQI
55AQI
55AQI
54AQI
60AQI
66AQI
65AQI
59AQI
47AQI
49AQI
49AQI
43AQI
39AQI
43AQI
36AQI
39AQI
40AQI
43AQI
44AQI
48AQI
50AQI
50AQI
52AQI
53AQI
50AQI
49AQI
51AQI
46AQI
46AQI
39AQI
41AQI
45AQI
54AQI
51AQI
46AQI
37AQI
34AQI
40AQI
42AQI
34AQI
33AQI
35AQI
41AQI
46AQI
45AQI
42AQI
44AQI
45AQI
48AQI
47AQI
47AQI
48AQI
54AQI
55AQI
56AQI
50AQI
48AQI
49AQI
52AQI
51AQI
45AQI
39AQI
36AQI
32AQI
29AQI
31AQI
31AQI
36AQI
40AQI
44AQI
36AQI
35AQI
39AQI
40AQI
38AQI
43AQI
45AQI
33AQI
28AQI
27AQI
22AQI
25AQI
28AQI
31AQI
41AQI
31AQI
30AQI
40AQI
43AQI
30AQI
33AQI
40AQI
41AQI
40AQI
45AQI
50AQI
45AQI
35AQI
No. of days
202540AQI
Highest AQI recorded in
July50AQI
Lowest AQI recorded in
January30AQI
202435AQI
Highest AQI recorded in
April52AQI
Lowest AQI recorded in
January25AQI
202336AQI
Highest AQI recorded in
April47AQI
Lowest AQI recorded in
December27AQI
202237AQI
Highest AQI recorded in
August50AQI
Lowest AQI recorded in
December23AQI
202133AQI
Highest AQI recorded in
June46AQI
Lowest AQI recorded in
January22AQI
202032AQI
Highest AQI recorded in
August55AQI
Lowest AQI recorded in
December21AQI
Most & Least Polluted Years Over the Last 6 Years
Nakanojomachi's annual 2025 AQI (40) shows an average percentage change of 15.9% (worsened AQI) compared to previous years: 2020 (32), 2021 (33), 2022 (37), 2023 (36), 2024 (35).