Nagaoka, Hamura, Tokyo, Japan Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
August Air Quality Analysis
Nagaoka, Hamura, Tokyo, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (16th August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 2nd highest AQI at 26 of Good air quality, showing improvement over 2025 on the same day.
Day & Night AQI Trend: 15th Aug - 16th Aug 2026
Nagaoka, Hamura, Tokyo, Japan
4 AM15th Aug 2026
6 PM
3 AM16th Aug 2026
38AQI
23AQI
29AQI
23AQI
In the last 24 hours,
Nagaoka's AQI reached its highest point of 38 at 6 PM during the Day, while the lowest point, 23, was recorded at 8 PM during the Night between 15th Aug and 16th Aug 2026.
Day & Night AQI Trend : Jul - Aug 2026
Nagaoka, Hamura, Tokyo, Japan
27°C25/31°C
28°C24/32°C
31°C26/36°C
32°C27/37°C
31°C27/37°C
31°C27/37°C
29°C27/33°C
29°C25/34°C
27°C25/31°C
26°C23/31°C
25°C23/30°C
28°C22/34°C
30°C25/35°C
29°C25/35°C
30°C26/35°C
29°C24/35°C
23°C22/25°C
24°C21/30°C
26°C21/30°C
28°C25/33°C
28°C25/33°C
28°C25/34°C
28°C25/32°C
26°C24/30°C
24°C21/28°C
22°C21/23°C
25°C22/29°C
25°C23/28°C
25°C23/30°C
25°C23/29°C
33AQI
30AQI
34AQI
30AQI
2026 Days Vs Air Quality
Nagaoka, Hamura, Tokyo, Japan
83%
189
17%
39
Total number of days with different AQI categories in last 228 days in 2026 (137 days remaining)
Under WHO’s Safe Air Quality Limits: 83%
Health Risk Level:
Low
In 2026, 83% of 228 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
Nagaoka, Hamura, Tokyo, Japan
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
23AQI (US)
14AQI (US)
14AQI (US)
16AQI (US)
23AQI (US)
21AQI (US)
30AQI (US)
24AQI (US)
22AQI (US)
21AQI (US)
24AQI (US)
16AQI (US)
26AQI (US)
22AQI (US)
30AQI (US)
44AQI (US)
47AQI (US)
41AQI (US)
47AQI (US)
33AQI (US)
16AQI (US)
28AQI (US)
51AQI (US)
52AQI (US)
38AQI (US)
13AQI (US)
21AQI (US)
26AQI (US)
26AQI (US)
37AQI (US)
36AQI (US)
43AQI (US)
55AQI (US)
31AQI (US)
47AQI (US)
50AQI (US)
39AQI (US)
16AQI (US)
19AQI (US)
43AQI (US)
20AQI (US)
27AQI (US)
34AQI (US)
50AQI (US)
63AQI (US)
53AQI (US)
47AQI (US)
24AQI (US)
31AQI (US)
32AQI (US)
29AQI (US)
38AQI (US)
36AQI (US)
42AQI (US)
38AQI (US)
36AQI (US)
12AQI (US)
27AQI (US)
49AQI (US)
51AQI (US)
82AQI (US)
50AQI (US)
53AQI (US)
60AQI (US)
52AQI (US)
49AQI (US)
46AQI (US)
53AQI (US)
58AQI (US)
59AQI (US)
72AQI (US)
46AQI (US)
38AQI (US)
18AQI (US)
31AQI (US)
54AQI (US)
58AQI (US)
38AQI (US)
32AQI (US)
51AQI (US)
52AQI (US)
54AQI (US)
48AQI (US)
71AQI (US)
20AQI (US)
19AQI (US)
50AQI (US)
54AQI (US)
55AQI (US)
31AQI (US)
17AQI (US)
25AQI (US)
45AQI (US)
45AQI (US)
37AQI (US)
26AQI (US)
44AQI (US)
24AQI (US)
34AQI (US)
47AQI (US)
41AQI (US)
31AQI (US)
38AQI (US)
48AQI (US)
45AQI (US)
36AQI (US)
40AQI (US)
34AQI (US)
41AQI (US)
38AQI (US)
41AQI (US)
47AQI (US)
36AQI (US)
32AQI (US)
46AQI (US)
51AQI (US)
48AQI (US)
43AQI (US)
41AQI (US)
39AQI (US)
48AQI (US)
51AQI (US)
44AQI (US)
29AQI (US)
24AQI (US)
35AQI (US)
36AQI (US)
28AQI (US)
28AQI (US)
35AQI (US)
38AQI (US)
41AQI (US)
44AQI (US)
41AQI (US)
43AQI (US)
86AQI (US)
69AQI (US)
53AQI (US)
48AQI (US)
62AQI (US)
60AQI (US)
61AQI (US)
53AQI (US)
58AQI (US)
47AQI (US)
39AQI (US)
25AQI (US)
25AQI (US)
25AQI (US)
25AQI (US)
35AQI (US)
46AQI (US)
35AQI (US)
22AQI (US)
24AQI (US)
22AQI (US)
24AQI (US)
22AQI (US)
20AQI (US)
23AQI (US)
22AQI (US)
25AQI (US)
25AQI (US)
27AQI (US)
25AQI (US)
20AQI (US)
26AQI (US)
24AQI (US)
25AQI (US)
30AQI (US)
22AQI (US)
20AQI (US)
19AQI (US)
22AQI (US)
22AQI (US)
24AQI (US)
29AQI (US)
27AQI (US)
28AQI (US)
27AQI (US)
25AQI (US)
27AQI (US)
18AQI (US)
13AQI (US)
41AQI (US)
14AQI (US)
26AQI (US)
26AQI (US)
25AQI (US)
25AQI (US)
26AQI (US)
28AQI (US)
27AQI (US)
28AQI (US)
29AQI (US)
30AQI (US)
64AQI (US)
59AQI (US)
26AQI (US)
30AQI (US)
28AQI (US)
52AQI (US)
64AQI (US)
58AQI (US)
43AQI (US)
42AQI (US)
27AQI (US)
23AQI (US)
27AQI (US)
27AQI (US)
31AQI (US)
55AQI (US)
57AQI (US)
45AQI (US)
21AQI (US)
25AQI (US)
26AQI (US)
23AQI (US)
25AQI (US)
24AQI (US)
26AQI (US)
23AQI (US)
27AQI (US)
23AQI (US)
23AQI (US)
20AQI (US)
27AQI (US)
26AQI (US)
28AQI (US)
37AQI (US)
49AQI (US)
39AQI (US)
43AQI (US)
25AQI (US)
34AQI (US)
28AQI (US)
No. of days
202636AQI (US)
Highest AQI (US) recorded in
March49AQI (US)
Lowest AQI (US) recorded in
June25AQI (US)
202534AQI (US)
Highest AQI (US) recorded in
July47AQI (US)
Lowest AQI (US) recorded in
June24AQI (US)
202430AQI (US)
Highest AQI (US) recorded in
June41AQI (US)
Lowest AQI (US) recorded in
December24AQI (US)
202328AQI (US)
Highest AQI (US) recorded in
April40AQI (US)
Lowest AQI (US) recorded in
August20AQI (US)
202227AQI (US)
Highest AQI (US) recorded in
April35AQI (US)
Lowest AQI (US) recorded in
October19AQI (US)
202122AQI (US)
Highest AQI (US) recorded in
June33AQI (US)
Lowest AQI (US) recorded in
January13AQI (US)
202016AQI (US)
Highest AQI (US) recorded in
March21AQI (US)
Lowest AQI (US) recorded in
September11AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Nagaoka's annual 2026 AQI (US) (36) shows an average percentage change of 46.07% (worsened AQI (US)) compared to previous years: 2020 (16), 2021 (22), 2022 (27), 2023 (28), 2024 (30), 2025 (34).