Yotsukaido, Chiba, 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
Yotsukaido, Chiba, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (5th August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 4th highest AQI at 28 of Good air quality, showing improvement over 2025, 2024 and 2023 on the same day.
Day & Night AQI Trend: 4th Aug - 5th Aug 2026
Yotsukaido, Chiba, Japan
4 AM4th Aug 2026
6 PM
3 AM5th Aug 2026
34AQI
19AQI
34AQI
31AQI
In the last 24 hours,
Yotsukaido's AQI reached its highest point of 34 at 5 PM during the Day, while the lowest point, 19, was recorded at 9 AM during the Day between 4th Aug and 5th Aug 2026.
Day & Night AQI Trend : Jul - Aug 2026
Yotsukaido, Chiba, Japan
24°C20/28°C
24°C20/29°C
25°C22/29°C
26°C22/30°C
26°C23/30°C
25°C23/27°C
26°C24/30°C
27°C23/31°C
28°C25/32°C
28°C26/32°C
28°C25/30°C
27°C24/29°C
27°C24/29°C
29°C25/34°C
30°C26/35°C
30°C26/34°C
30°C27/35°C
28°C26/32°C
27°C23/32°C
27°C24/30°C
26°C23/29°C
26°C23/29°C
28°C24/33°C
30°C26/34°C
29°C27/34°C
30°C26/34°C
28°C24/33°C
24°C23/27°C
24°C22/27°C
25°C22/29°C
40AQI
36AQI
39AQI
36AQI
2026 Days Vs Air Quality
Yotsukaido, Chiba, Japan
86%
186
14%
31
Total number of days with different AQI categories in last 217 days in 2026 (148 days remaining)
Under WHO’s Safe Air Quality Limits: 86%
Health Risk Level:
Low
In 2026, 86% of 217 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
Yotsukaido, Chiba, Japan
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
18AQI (US)
23AQI (US)
20AQI (US)
25AQI (US)
50AQI (US)
25AQI (US)
36AQI (US)
41AQI (US)
18AQI (US)
42AQI (US)
40AQI (US)
23AQI (US)
47AQI (US)
17AQI (US)
37AQI (US)
49AQI (US)
54AQI (US)
36AQI (US)
41AQI (US)
44AQI (US)
14AQI (US)
27AQI (US)
38AQI (US)
41AQI (US)
27AQI (US)
21AQI (US)
42AQI (US)
31AQI (US)
18AQI (US)
33AQI (US)
37AQI (US)
39AQI (US)
36AQI (US)
17AQI (US)
39AQI (US)
66AQI (US)
65AQI (US)
15AQI (US)
10AQI (US)
32AQI (US)
39AQI (US)
61AQI (US)
35AQI (US)
42AQI (US)
55AQI (US)
55AQI (US)
51AQI (US)
14AQI (US)
33AQI (US)
13AQI (US)
22AQI (US)
42AQI (US)
45AQI (US)
30AQI (US)
36AQI (US)
16AQI (US)
16AQI (US)
43AQI (US)
43AQI (US)
35AQI (US)
72AQI (US)
43AQI (US)
56AQI (US)
53AQI (US)
49AQI (US)
45AQI (US)
40AQI (US)
49AQI (US)
58AQI (US)
57AQI (US)
66AQI (US)
40AQI (US)
45AQI (US)
56AQI (US)
48AQI (US)
36AQI (US)
39AQI (US)
41AQI (US)
33AQI (US)
42AQI (US)
51AQI (US)
43AQI (US)
41AQI (US)
46AQI (US)
29AQI (US)
29AQI (US)
51AQI (US)
56AQI (US)
52AQI (US)
23AQI (US)
27AQI (US)
10AQI (US)
39AQI (US)
45AQI (US)
38AQI (US)
29AQI (US)
26AQI (US)
19AQI (US)
28AQI (US)
47AQI (US)
42AQI (US)
29AQI (US)
35AQI (US)
38AQI (US)
35AQI (US)
33AQI (US)
35AQI (US)
30AQI (US)
31AQI (US)
35AQI (US)
39AQI (US)
45AQI (US)
38AQI (US)
32AQI (US)
44AQI (US)
50AQI (US)
48AQI (US)
43AQI (US)
38AQI (US)
18AQI (US)
43AQI (US)
48AQI (US)
43AQI (US)
31AQI (US)
21AQI (US)
28AQI (US)
27AQI (US)
25AQI (US)
21AQI (US)
30AQI (US)
29AQI (US)
31AQI (US)
38AQI (US)
35AQI (US)
34AQI (US)
86AQI (US)
69AQI (US)
53AQI (US)
49AQI (US)
62AQI (US)
59AQI (US)
59AQI (US)
53AQI (US)
58AQI (US)
46AQI (US)
39AQI (US)
24AQI (US)
26AQI (US)
26AQI (US)
23AQI (US)
29AQI (US)
38AQI (US)
28AQI (US)
17AQI (US)
21AQI (US)
22AQI (US)
21AQI (US)
22AQI (US)
21AQI (US)
23AQI (US)
22AQI (US)
24AQI (US)
23AQI (US)
41AQI (US)
45AQI (US)
13AQI (US)
20AQI (US)
24AQI (US)
24AQI (US)
26AQI (US)
22AQI (US)
20AQI (US)
19AQI (US)
21AQI (US)
21AQI (US)
26AQI (US)
30AQI (US)
26AQI (US)
26AQI (US)
26AQI (US)
22AQI (US)
32AQI (US)
21AQI (US)
17AQI (US)
35AQI (US)
19AQI (US)
25AQI (US)
26AQI (US)
23AQI (US)
23AQI (US)
22AQI (US)
22AQI (US)
26AQI (US)
42AQI (US)
41AQI (US)
45AQI (US)
74AQI (US)
47AQI (US)
17AQI (US)
28AQI (US)
39AQI (US)
49AQI (US)
66AQI (US)
59AQI (US)
32AQI (US)
35AQI (US)
34AQI (US)
27AQI (US)
38AQI (US)
37AQI (US)
41AQI (US)
45AQI (US)
61AQI (US)
54AQI (US)
19AQI (US)
26AQI (US)
28AQI (US)
33AQI (US)
36AQI (US)
46AQI (US)
35AQI (US)
40AQI (US)
24AQI (US)
35AQI (US)
38AQI (US)
No. of days
202636AQI (US)
Highest AQI (US) recorded in
March46AQI (US)
Lowest AQI (US) recorded in
June24AQI (US)
202541AQI (US)
Highest AQI (US) recorded in
October50AQI (US)
Lowest AQI (US) recorded in
May31AQI (US)
202439AQI (US)
Highest AQI (US) recorded in
July58AQI (US)
Lowest AQI (US) recorded in
October32AQI (US)
202341AQI (US)
Highest AQI (US) recorded in
April46AQI (US)
Lowest AQI (US) recorded in
August30AQI (US)
202240AQI (US)
Highest AQI (US) recorded in
March45AQI (US)
Lowest AQI (US) recorded in
August32AQI (US)
202138AQI (US)
Highest AQI (US) recorded in
December45AQI (US)
Lowest AQI (US) recorded in
April33AQI (US)
202038AQI (US)
Highest AQI (US) recorded in
August45AQI (US)
Lowest AQI (US) recorded in
May29AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Yotsukaido's annual 2026 AQI (US) (36) shows an average percentage change of -8.7% (improved AQI (US)) compared to previous years: 2020 (38), 2021 (38), 2022 (40), 2023 (41), 2024 (39), 2025 (41).