Tsuruoka, Yamagata, 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
Tsuruoka, Yamagata, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (29th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 46 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 30th Sep - 1st Oct 2025
Tsuruoka, Yamagata, Japan
5 AM30th Sep 2025
5 PM
4 AM1st Oct 2025
AQI
AQI
61AQI
40AQI
In the last 24 hours,
Tsuruoka's AQI reached its highest point of 61 at 11 PM during the Night, while the lowest point, 40, was recorded at 9 AM during the Night between 30th Sep and 1st Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Tsuruoka, Yamagata, Japan
27°C23/30°C
27°C24/30°C
24°C20/26°C
24°C19/30°C
23°C22/26°C
24°C20/26°C
24°C19/29°C
24°C22/26°C
24°C19/27°C
23°C20/27°C
22°C19/25°C
23°C20/28°C
22°C21/24°C
23°C20/24°C
23°C20/26°C
24°C22/26°C
24°C21/27°C
21°C18/22°C
19°C16/22°C
19°C17/22°C
21°C19/22°C
20°C16/22°C
19°C15/24°C
19°C15/25°C
21°C17/23°C
22°C20/24°C
20°C16/23°C
19°C15/23°C
20°C18/21°C
--°C/°C
--°C/°C
34AQI
27AQI
34AQI
32AQI
2025 Days Vs Air Quality
Tsuruoka, Yamagata, Japan
93%
254
7%
18
Total number of days with different AQI categories in last 273 days in 2025 (92 days remaining)
Under WHO’s Safe Air Quality Limits: 93%
Health Risk Level:
Very Low
In 2025, 93% of 273 days were within WHO’s safe air quality limits. The risk of health issues is Very Low, but health impacts are still unclear.
Annual Air Quality Insights
Tsuruoka, Yamagata, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
30AQI
27AQI
28AQI
31AQI
29AQI
25AQI
31AQI
28AQI
28AQI
29AQI
27AQI
26AQI
28AQI
34AQI
29AQI
29AQI
27AQI
29AQI
32AQI
35AQI
38AQI
33AQI
34AQI
36AQI
28AQI
29AQI
25AQI
29AQI
29AQI
31AQI
32AQI
31AQI
28AQI
29AQI
31AQI
30AQI
32AQI
32AQI
31AQI
31AQI
32AQI
33AQI
31AQI
33AQI
32AQI
31AQI
33AQI
45AQI
31AQI
37AQI
31AQI
32AQI
32AQI
33AQI
32AQI
35AQI
44AQI
36AQI
51AQI
47AQI
54AQI
38AQI
39AQI
30AQI
32AQI
33AQI
33AQI
33AQI
37AQI
38AQI
38AQI
48AQI
36AQI
37AQI
22AQI
23AQI
24AQI
21AQI
29AQI
48AQI
54AQI
37AQI
43AQI
55AQI
41AQI
50AQI
38AQI
30AQI
27AQI
27AQI
24AQI
21AQI
21AQI
21AQI
24AQI
25AQI
24AQI
29AQI
25AQI
29AQI
31AQI
33AQI
23AQI
21AQI
20AQI
25AQI
32AQI
38AQI
47AQI
35AQI
32AQI
29AQI
29AQI
23AQI
25AQI
39AQI
34AQI
37AQI
27AQI
24AQI
25AQI
22AQI
28AQI
28AQI
28AQI
26AQI
25AQI
27AQI
30AQI
24AQI
28AQI
26AQI
37AQI
33AQI
40AQI
43AQI
33AQI
40AQI
34AQI
48AQI
48AQI
40AQI
38AQI
34AQI
27AQI
28AQI
28AQI
31AQI
30AQI
31AQI
23AQI
24AQI
32AQI
34AQI
32AQI
32AQI
33AQI
42AQI
48AQI
49AQI
47AQI
44AQI
37AQI
35AQI
34AQI
27AQI
29AQI
32AQI
38AQI
43AQI
48AQI
51AQI
61AQI
49AQI
45AQI
47AQI
40AQI
51AQI
40AQI
42AQI
47AQI
51AQI
54AQI
61AQI
66AQI
62AQI
59AQI
59AQI
57AQI
54AQI
51AQI
46AQI
45AQI
48AQI
42AQI
41AQI
46AQI
42AQI
40AQI
43AQI
42AQI
40AQI
40AQI
41AQI
44AQI
44AQI
47AQI
46AQI
42AQI
40AQI
46AQI
43AQI
35AQI
35AQI
38AQI
46AQI
43AQI
38AQI
35AQI
35AQI
34AQI
35AQI
30AQI
30AQI
30AQI
30AQI
31AQI
30AQI
35AQI
36AQI
44AQI
49AQI
46AQI
44AQI
47AQI
46AQI
45AQI
52AQI
40AQI
34AQI
40AQI
42AQI
40AQI
43AQI
39AQI
34AQI
34AQI
29AQI
27AQI
28AQI
29AQI
35AQI
31AQI
32AQI
34AQI
28AQI
29AQI
29AQI
33AQI
35AQI
30AQI
28AQI
27AQI
26AQI
26AQI
28AQI
29AQI
33AQI
44AQI
34AQI
29AQI
46AQI
30AQI
34AQI
37AQI
28AQI
32AQI
40AQI
48AQI
39AQI
32AQI
No. of days
202536AQI
Highest AQI recorded in
July48AQI
Lowest AQI recorded in
April28AQI
202435AQI
Highest AQI recorded in
April46AQI
Lowest AQI recorded in
January27AQI
202339AQI
Highest AQI recorded in
July49AQI
Lowest AQI recorded in
December25AQI
202236AQI
Highest AQI recorded in
May46AQI
Lowest AQI recorded in
December27AQI
202134AQI
Highest AQI recorded in
June41AQI
Lowest AQI recorded in
January29AQI
202031AQI
Highest AQI recorded in
August50AQI
Lowest AQI recorded in
December24AQI
Most & Least Polluted Years Over the Last 6 Years
Tsuruoka's annual 2025 AQI (36) shows an average percentage change of 1.5% (worsened AQI) compared to previous years: 2020 (31), 2021 (34), 2022 (36), 2023 (39), 2024 (35).