Kosai, Shizuoka, 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
Kosai, Shizuoka, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (6th August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 3rd highest AQI at 27 of Good air quality, showing improvement over 2025 and 2024 on the same day.
Day & Night AQI Trend: 5th Aug - 6th Aug 2026
Kosai, Shizuoka, Japan
4 AM5th Aug 2026
7 PM
3 AM6th Aug 2026
32AQI
27AQI
32AQI
26AQI
In the last 24 hours,
Kosai's AQI reached its highest point of 32 at 9 AM during the Day, while the lowest point, 26, was recorded at 9 PM during the Night between 5th Aug and 6th Aug 2026.
Day & Night AQI Trend : Jul - Aug 2026
Kosai, Shizuoka, Japan
24°C23/26°C
25°C22/28°C
26°C23/29°C
26°C23/30°C
27°C24/30°C
28°C27/31°C
30°C25/35°C
30°C26/35°C
32°C28/36°C
29°C27/32°C
28°C26/30°C
28°C26/31°C
29°C26/32°C
30°C27/35°C
32°C27/37°C
33°C28/39°C
30°C28/34°C
31°C28/35°C
29°C27/32°C
29°C26/32°C
28°C25/31°C
30°C26/35°C
32°C27/37°C
32°C27/37°C
32°C28/37°C
31°C28/35°C
28°C26/31°C
26°C24/30°C
29°C24/33°C
29°C26/33°C
40AQI
36AQI
38AQI
37AQI
2026 Days Vs Air Quality
Kosai, Shizuoka, Japan
85%
186
15%
32
Total number of days with different AQI categories in last 218 days in 2026 (147 days remaining)
Under WHO’s Safe Air Quality Limits: 85%
Health Risk Level:
Low
In 2026, 85% of 218 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
Kosai, Shizuoka, Japan
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
20AQI (US)
14AQI (US)
15AQI (US)
22AQI (US)
45AQI (US)
16AQI (US)
23AQI (US)
30AQI (US)
12AQI (US)
26AQI (US)
25AQI (US)
22AQI (US)
34AQI (US)
22AQI (US)
34AQI (US)
54AQI (US)
55AQI (US)
50AQI (US)
52AQI (US)
27AQI (US)
10AQI (US)
20AQI (US)
36AQI (US)
46AQI (US)
30AQI (US)
10AQI (US)
36AQI (US)
30AQI (US)
25AQI (US)
36AQI (US)
33AQI (US)
32AQI (US)
44AQI (US)
30AQI (US)
35AQI (US)
52AQI (US)
52AQI (US)
17AQI (US)
16AQI (US)
33AQI (US)
38AQI (US)
36AQI (US)
36AQI (US)
48AQI (US)
58AQI (US)
62AQI (US)
56AQI (US)
22AQI (US)
28AQI (US)
28AQI (US)
35AQI (US)
49AQI (US)
42AQI (US)
51AQI (US)
56AQI (US)
24AQI (US)
24AQI (US)
42AQI (US)
29AQI (US)
15AQI (US)
55AQI (US)
37AQI (US)
16AQI (US)
46AQI (US)
49AQI (US)
41AQI (US)
34AQI (US)
40AQI (US)
56AQI (US)
53AQI (US)
58AQI (US)
38AQI (US)
44AQI (US)
57AQI (US)
47AQI (US)
44AQI (US)
47AQI (US)
30AQI (US)
28AQI (US)
40AQI (US)
44AQI (US)
38AQI (US)
56AQI (US)
53AQI (US)
14AQI (US)
19AQI (US)
52AQI (US)
58AQI (US)
44AQI (US)
28AQI (US)
12AQI (US)
32AQI (US)
48AQI (US)
43AQI (US)
32AQI (US)
24AQI (US)
33AQI (US)
27AQI (US)
28AQI (US)
46AQI (US)
34AQI (US)
28AQI (US)
36AQI (US)
40AQI (US)
33AQI (US)
33AQI (US)
34AQI (US)
26AQI (US)
30AQI (US)
32AQI (US)
37AQI (US)
46AQI (US)
36AQI (US)
31AQI (US)
46AQI (US)
50AQI (US)
49AQI (US)
45AQI (US)
37AQI (US)
22AQI (US)
12AQI (US)
52AQI (US)
44AQI (US)
26AQI (US)
21AQI (US)
28AQI (US)
30AQI (US)
26AQI (US)
26AQI (US)
28AQI (US)
28AQI (US)
27AQI (US)
37AQI (US)
30AQI (US)
34AQI (US)
85AQI (US)
68AQI (US)
53AQI (US)
48AQI (US)
61AQI (US)
60AQI (US)
62AQI (US)
54AQI (US)
58AQI (US)
48AQI (US)
40AQI (US)
24AQI (US)
25AQI (US)
20AQI (US)
23AQI (US)
26AQI (US)
26AQI (US)
25AQI (US)
24AQI (US)
20AQI (US)
22AQI (US)
24AQI (US)
21AQI (US)
19AQI (US)
23AQI (US)
23AQI (US)
25AQI (US)
24AQI (US)
27AQI (US)
24AQI (US)
22AQI (US)
22AQI (US)
24AQI (US)
25AQI (US)
25AQI (US)
22AQI (US)
22AQI (US)
18AQI (US)
22AQI (US)
22AQI (US)
26AQI (US)
27AQI (US)
26AQI (US)
26AQI (US)
24AQI (US)
45AQI (US)
31AQI (US)
22AQI (US)
22AQI (US)
24AQI (US)
21AQI (US)
22AQI (US)
25AQI (US)
25AQI (US)
24AQI (US)
26AQI (US)
23AQI (US)
28AQI (US)
28AQI (US)
28AQI (US)
32AQI (US)
50AQI (US)
48AQI (US)
36AQI (US)
18AQI (US)
28AQI (US)
48AQI (US)
68AQI (US)
64AQI (US)
82AQI (US)
58AQI (US)
49AQI (US)
28AQI (US)
32AQI (US)
27AQI (US)
40AQI (US)
32AQI (US)
37AQI (US)
47AQI (US)
39AQI (US)
26AQI (US)
30AQI (US)
27AQI (US)
29AQI (US)
38AQI (US)
41AQI (US)
35AQI (US)
39AQI (US)
24AQI (US)
35AQI (US)
34AQI (US)
No. of days
202635AQI (US)
Highest AQI (US) recorded in
March41AQI (US)
Lowest AQI (US) recorded in
June24AQI (US)
202539AQI (US)
Highest AQI (US) recorded in
August48AQI (US)
Lowest AQI (US) recorded in
September33AQI (US)
202437AQI (US)
Highest AQI (US) recorded in
April64AQI (US)
Lowest AQI (US) recorded in
December29AQI (US)
202339AQI (US)
Highest AQI (US) recorded in
April51AQI (US)
Lowest AQI (US) recorded in
August26AQI (US)
202237AQI (US)
Highest AQI (US) recorded in
May47AQI (US)
Lowest AQI (US) recorded in
December29AQI (US)
202134AQI (US)
Highest AQI (US) recorded in
June39AQI (US)
Lowest AQI (US) recorded in
January27AQI (US)
202030AQI (US)
Highest AQI (US) recorded in
August36AQI (US)
Lowest AQI (US) recorded in
December26AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Kosai's annual 2026 AQI (US) (35) shows an average percentage change of -1.9% (improved AQI (US)) compared to previous years: 2020 (30), 2021 (34), 2022 (37), 2023 (39), 2024 (37), 2025 (39).