Yamagata, Yamagata, 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
Yamagata, Yamagata, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (24th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 52 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 25th Aug - 26th Aug 2025
Yamagata, Yamagata, Japan
4 AM25th Aug 2025
6 PM
3 AM26th Aug 2025
AQI
AQI
64AQI
41AQI
In the last 24 hours,
Yamagata's AQI reached its highest point of 64 at 11 AM during the Night, while the lowest point, 41, was recorded at 12 AM during the Night between 25th Aug and 26th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Yamagata, Yamagata, Japan
26°C20/34°C
26°C20/34°C
26°C19/35°C
24°C17/33°C
23°C16/32°C
23°C17/29°C
26°C22/33°C
26°C22/34°C
27°C21/34°C
26°C21/30°C
25°C23/29°C
24°C21/27°C
23°C17/29°C
22°C16/30°C
20°C18/24°C
24°C21/30°C
21°C19/22°C
22°C17/29°C
23°C17/30°C
23°C18/29°C
22°C16/31°C
24°C17/31°C
25°C19/31°C
24°C18/32°C
25°C20/32°C
24°C19/31°C
24°C18/32°C
26°C19/34°C
25°C20/34°C
--°C/°C
--°C/°C
45AQI
42AQI
45AQI
42AQI
2025 Days Vs Air Quality
Yamagata, Yamagata, Japan
87%
205
13%
31
Total number of days with different AQI categories in last 237 days in 2025 (128 days remaining)
Under WHO’s Safe Air Quality Limits: 87%
Health Risk Level:
Low
In 2025, 87% of 237 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
Yamagata, Yamagata, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
28AQI
32AQI
26AQI
25AQI
25AQI
33AQI
26AQI
25AQI
23AQI
22AQI
23AQI
24AQI
30AQI
31AQI
25AQI
25AQI
24AQI
25AQI
31AQI
44AQI
51AQI
46AQI
44AQI
40AQI
33AQI
30AQI
33AQI
40AQI
25AQI
29AQI
25AQI
27AQI
29AQI
34AQI
26AQI
25AQI
26AQI
28AQI
25AQI
24AQI
25AQI
25AQI
29AQI
27AQI
27AQI
27AQI
33AQI
40AQI
28AQI
29AQI
24AQI
23AQI
24AQI
25AQI
26AQI
29AQI
39AQI
40AQI
52AQI
50AQI
58AQI
36AQI
37AQI
25AQI
27AQI
28AQI
32AQI
29AQI
37AQI
41AQI
44AQI
50AQI
41AQI
41AQI
30AQI
23AQI
28AQI
25AQI
30AQI
49AQI
52AQI
41AQI
54AQI
64AQI
61AQI
63AQI
49AQI
40AQI
38AQI
37AQI
35AQI
28AQI
27AQI
26AQI
33AQI
33AQI
31AQI
40AQI
33AQI
44AQI
44AQI
43AQI
31AQI
27AQI
27AQI
29AQI
43AQI
48AQI
57AQI
51AQI
45AQI
46AQI
40AQI
34AQI
37AQI
48AQI
48AQI
50AQI
35AQI
31AQI
34AQI
26AQI
35AQI
33AQI
36AQI
33AQI
30AQI
36AQI
39AQI
29AQI
28AQI
29AQI
38AQI
44AQI
48AQI
52AQI
41AQI
45AQI
43AQI
52AQI
56AQI
48AQI
46AQI
41AQI
31AQI
33AQI
32AQI
34AQI
37AQI
35AQI
25AQI
26AQI
37AQI
40AQI
36AQI
38AQI
43AQI
51AQI
56AQI
58AQI
53AQI
46AQI
43AQI
42AQI
43AQI
33AQI
32AQI
34AQI
36AQI
41AQI
41AQI
44AQI
58AQI
52AQI
46AQI
46AQI
40AQI
43AQI
39AQI
41AQI
47AQI
50AQI
53AQI
60AQI
62AQI
58AQI
58AQI
58AQI
60AQI
61AQI
55AQI
49AQI
48AQI
50AQI
43AQI
43AQI
46AQI
41AQI
44AQI
46AQI
47AQI
46AQI
43AQI
44AQI
48AQI
49AQI
50AQI
51AQI
47AQI
51AQI
46AQI
44AQI
37AQI
40AQI
44AQI
49AQI
48AQI
42AQI
36AQI
33AQI
34AQI
40AQI
34AQI
33AQI
34AQI
36AQI
42AQI
42AQI
40AQI
43AQI
44AQI
48AQI
48AQI
50AQI
49AQI
52AQI
30AQI
29AQI
41AQI
38AQI
38AQI
43AQI
50AQI
42AQI
No. of days
202539AQI
Highest AQI recorded in
July50AQI
Lowest AQI recorded in
February29AQI
202435AQI
Highest AQI recorded in
April48AQI
Lowest AQI recorded in
December24AQI
202339AQI
Highest AQI recorded in
April47AQI
Lowest AQI recorded in
December27AQI
202235AQI
Highest AQI recorded in
May43AQI
Lowest AQI recorded in
December23AQI
202134AQI
Highest AQI recorded in
June46AQI
Lowest AQI recorded in
January27AQI
202031AQI
Highest AQI recorded in
August43AQI
Lowest AQI recorded in
December24AQI
Most & Least Polluted Years Over the Last 6 Years
Yamagata's annual 2025 AQI (39) shows an average percentage change of 12.3% (worsened AQI) compared to previous years: 2020 (31), 2021 (34), 2022 (35), 2023 (39), 2024 (35).