Hamamatsu, Shizuoka, 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
Hamamatsu, Shizuoka, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (15th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 38 of Good air quality, showing improvement over 2023 and 2022 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 15th Sep - 16th Sep 2025
Hamamatsu, Shizuoka, Japan
5 AM15th Sep 2025
6 PM
4 AM16th Sep 2025
52AQI
32AQI
57AQI
35AQI
In the last 24 hours,
Hamamatsu's AQI reached its highest point of 57 at 6 PM during the Night, while the lowest point, 32, was recorded at 8 AM during the Day between 15th Sep and 16th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Hamamatsu, Shizuoka, Japan
28°C26/32°C
29°C26/33°C
29°C26/32°C
29°C26/33°C
30°C27/34°C
29°C26/32°C
29°C27/31°C
29°C27/32°C
29°C27/32°C
29°C26/31°C
29°C26/33°C
29°C27/31°C
29°C26/32°C
30°C27/36°C
30°C27/33°C
29°C27/33°C
29°C27/32°C
29°C26/33°C
26°C24/26°C
26°C24/27°C
27°C24/30°C
28°C25/31°C
29°C26/34°C
29°C27/33°C
28°C26/31°C
28°C26/30°C
26°C24/29°C
26°C24/28°C
28°C26/31°C
29°C27/33°C
--°C/°C
47AQI
40AQI
42AQI
39AQI
2025 Days Vs Air Quality
Hamamatsu, Shizuoka, Japan
85%
220
14%
37
0.3%
1
Total number of days with different AQI categories in last 259 days in 2025 (106 days remaining)
Under WHO’s Safe Air Quality Limits: 85%
Health Risk Level:
Low
In 2025, 85% of 259 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
Hamamatsu, Shizuoka, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
31AQI
32AQI
31AQI
30AQI
30AQI
27AQI
33AQI
26AQI
30AQI
26AQI
28AQI
27AQI
28AQI
39AQI
37AQI
29AQI
31AQI
28AQI
28AQI
30AQI
32AQI
33AQI
53AQI
49AQI
41AQI
38AQI
27AQI
33AQI
29AQI
32AQI
42AQI
43AQI
34AQI
37AQI
33AQI
34AQI
31AQI
34AQI
31AQI
31AQI
31AQI
33AQI
29AQI
32AQI
32AQI
30AQI
34AQI
39AQI
32AQI
33AQI
32AQI
31AQI
32AQI
33AQI
35AQI
36AQI
38AQI
46AQI
51AQI
47AQI
53AQI
40AQI
37AQI
27AQI
33AQI
32AQI
32AQI
35AQI
35AQI
32AQI
28AQI
43AQI
33AQI
37AQI
20AQI
21AQI
21AQI
19AQI
30AQI
50AQI
51AQI
63AQI
60AQI
66AQI
111AQI
75AQI
62AQI
45AQI
39AQI
34AQI
29AQI
28AQI
23AQI
22AQI
27AQI
25AQI
34AQI
39AQI
38AQI
50AQI
45AQI
51AQI
32AQI
49AQI
24AQI
42AQI
45AQI
53AQI
62AQI
48AQI
52AQI
43AQI
35AQI
38AQI
49AQI
50AQI
54AQI
44AQI
47AQI
51AQI
47AQI
31AQI
39AQI
33AQI
36AQI
26AQI
30AQI
29AQI
30AQI
24AQI
25AQI
35AQI
46AQI
48AQI
47AQI
48AQI
35AQI
49AQI
48AQI
58AQI
40AQI
34AQI
41AQI
38AQI
24AQI
29AQI
28AQI
29AQI
34AQI
28AQI
28AQI
23AQI
32AQI
28AQI
37AQI
42AQI
46AQI
51AQI
58AQI
43AQI
31AQI
32AQI
44AQI
41AQI
34AQI
31AQI
38AQI
41AQI
47AQI
51AQI
39AQI
33AQI
26AQI
24AQI
23AQI
23AQI
22AQI
35AQI
38AQI
35AQI
38AQI
42AQI
44AQI
45AQI
44AQI
82AQI
65AQI
77AQI
83AQI
75AQI
51AQI
51AQI
50AQI
48AQI
41AQI
45AQI
43AQI
44AQI
38AQI
35AQI
33AQI
30AQI
27AQI
27AQI
26AQI
25AQI
25AQI
23AQI
25AQI
28AQI
35AQI
33AQI
42AQI
44AQI
47AQI
65AQI
50AQI
54AQI
49AQI
47AQI
51AQI
44AQI
40AQI
37AQI
38AQI
40AQI
41AQI
40AQI
41AQI
45AQI
45AQI
46AQI
47AQI
44AQI
48AQI
57AQI
58AQI
54AQI
53AQI
51AQI
55AQI
56AQI
55AQI
42AQI
35AQI
40AQI
26AQI
25AQI
28AQI
31AQI
37AQI
40AQI
37AQI
31AQI
31AQI
28AQI
38AQI
38AQI
33AQI
35AQI
42AQI
41AQI
36AQI
36AQI
43AQI
48AQI
34AQI
No. of days
202539AQI
Highest AQI recorded in
August48AQI
Lowest AQI recorded in
January33AQI
202436AQI
Highest AQI recorded in
April47AQI
Lowest AQI recorded in
December29AQI
202336AQI
Highest AQI recorded in
April48AQI
Lowest AQI recorded in
August26AQI
202235AQI
Highest AQI recorded in
May45AQI
Lowest AQI recorded in
August24AQI
202134AQI
Highest AQI recorded in
June40AQI
Lowest AQI recorded in
January26AQI
202030AQI
Highest AQI recorded in
August39AQI
Lowest AQI recorded in
December24AQI
Most & Least Polluted Years Over the Last 6 Years
Hamamatsu's annual 2025 AQI (39) shows an average percentage change of 14.7% (worsened AQI) compared to previous years: 2020 (30), 2021 (34), 2022 (35), 2023 (36), 2024 (36).