Yamatemachi, Iwakuni, Yamaguchi, 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
Yamatemachi, Iwakuni, Yamaguchi, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (4th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 51 of Moderate air quality, showing improvement over 2024 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 5th Aug - 6th Aug 2025
Yamatemachi, Iwakuni, Yamaguchi, Japan
5 AM5th Aug 2025
7 PM
4 AM6th Aug 2025
AQI
AQI
53AQI
29AQI
In the last 24 hours,
Yamatemachi's AQI reached its highest point of 53 at 7 AM during the Night, while the lowest point, 29, was recorded at 7 PM during the Night between 5th Aug and 6th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Yamatemachi, Iwakuni, Yamaguchi, Japan
26°C22/30°C
26°C23/30°C
26°C23/30°C
26°C23/30°C
26°C23/29°C
26°C23/29°C
26°C24/29°C
24°C20/27°C
24°C21/29°C
25°C22/29°C
25°C23/28°C
24°C23/25°C
25°C23/28°C
26°C23/29°C
26°C23/30°C
26°C23/30°C
26°C23/30°C
26°C23/30°C
27°C24/30°C
27°C24/30°C
27°C23/31°C
26°C23/30°C
26°C23/30°C
26°C23/31°C
26°C23/31°C
27°C23/31°C
27°C23/32°C
27°C24/31°C
27°C25/30°C
--°C/°C
--°C/°C
49AQI
41AQI
49AQI
42AQI
2025 Days Vs Air Quality
Yamatemachi, Iwakuni, Yamaguchi, Japan
69%
149
31%
67
Total number of days with different AQI categories in last 217 days in 2025 (148 days remaining)
Under WHO’s Safe Air Quality Limits: 69%
Health Risk Level:
Moderate
In 2025, 69% of 217 days were within WHO’s safe air quality limits, and 31% exceeded them. The risk of health issues is Moderate, particularly for individuals with respiratory or heart conditions.
Annual Air Quality Insights
Yamatemachi, Iwakuni, Yamaguchi, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
27AQI
33AQI
30AQI
29AQI
28AQI
38AQI
30AQI
32AQI
29AQI
28AQI
28AQI
30AQI
40AQI
45AQI
37AQI
33AQI
31AQI
30AQI
40AQI
40AQI
50AQI
61AQI
71AQI
69AQI
45AQI
42AQI
34AQI
35AQI
31AQI
43AQI
49AQI
53AQI
35AQI
43AQI
32AQI
36AQI
30AQI
32AQI
30AQI
29AQI
30AQI
33AQI
35AQI
31AQI
38AQI
31AQI
40AQI
39AQI
33AQI
34AQI
30AQI
33AQI
36AQI
33AQI
36AQI
36AQI
42AQI
63AQI
60AQI
70AQI
75AQI
47AQI
40AQI
31AQI
36AQI
32AQI
39AQI
41AQI
41AQI
45AQI
50AQI
52AQI
35AQI
35AQI
20AQI
35AQI
30AQI
38AQI
46AQI
53AQI
63AQI
67AQI
59AQI
68AQI
72AQI
62AQI
53AQI
48AQI
39AQI
37AQI
39AQI
33AQI
26AQI
31AQI
40AQI
39AQI
43AQI
38AQI
59AQI
53AQI
56AQI
55AQI
44AQI
43AQI
29AQI
49AQI
49AQI
57AQI
54AQI
37AQI
39AQI
49AQI
32AQI
40AQI
65AQI
57AQI
59AQI
50AQI
48AQI
56AQI
55AQI
41AQI
48AQI
39AQI
44AQI
32AQI
35AQI
36AQI
38AQI
34AQI
40AQI
51AQI
56AQI
60AQI
57AQI
56AQI
45AQI
52AQI
59AQI
58AQI
46AQI
44AQI
47AQI
37AQI
28AQI
34AQI
42AQI
45AQI
50AQI
45AQI
40AQI
48AQI
54AQI
33AQI
43AQI
47AQI
53AQI
59AQI
65AQI
66AQI
37AQI
44AQI
52AQI
49AQI
40AQI
34AQI
36AQI
37AQI
47AQI
51AQI
57AQI
59AQI
61AQI
43AQI
47AQI
47AQI
52AQI
55AQI
56AQI
56AQI
56AQI
60AQI
78AQI
85AQI
90AQI
84AQI
66AQI
66AQI
71AQI
76AQI
85AQI
67AQI
61AQI
56AQI
41AQI
55AQI
57AQI
50AQI
38AQI
37AQI
36AQI
31AQI
31AQI
35AQI
39AQI
35AQI
28AQI
25AQI
32AQI
36AQI
36AQI
37AQI
44AQI
42AQI
42AQI
51AQI
38AQI
37AQI
47AQI
46AQI
45AQI
49AQI
52AQI
45AQI
No. of days
202545AQI
Highest AQI recorded in
July52AQI
Lowest AQI recorded in
February37AQI
202438AQI
Highest AQI recorded in
April51AQI
Lowest AQI recorded in
December31AQI
202341AQI
Highest AQI recorded in
April52AQI
Lowest AQI recorded in
February31AQI
202241AQI
Highest AQI recorded in
May54AQI
Lowest AQI recorded in
August27AQI
202140AQI
Highest AQI recorded in
June51AQI
Lowest AQI recorded in
December34AQI
202037AQI
Highest AQI recorded in
June45AQI
Lowest AQI recorded in
July29AQI
Most & Least Polluted Years Over the Last 6 Years
Yamatemachi's annual 2025 AQI (45) shows an average percentage change of 14.9% (worsened AQI) compared to previous years: 2020 (37), 2021 (40), 2022 (41), 2023 (41), 2024 (38).