Nishikimachi, Tsuruoka, Yamagata, Japan Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
October Air Quality Analysis
Nishikimachi, Tsuruoka, Yamagata, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (3rd October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 48 of Good air quality, showing improvement over 2022 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 3rd Oct - 4th Oct 2025
Nishikimachi, Tsuruoka, Yamagata, Japan
5 AM3rd Oct 2025
5 PM
4 AM4th Oct 2025
58AQI
46AQI
71AQI
45AQI
In the last 24 hours,
Nishikimachi's AQI reached its highest point of 71 at 1 AM during the Night, while the lowest point, 45, was recorded at 8 PM during the Night between 3rd Oct and 4th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Nishikimachi, Tsuruoka, Yamagata, Japan
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
20°C16/23°C
18°C16/21°C
19°C17/22°C
20°C17/24°C
--°C/°C
35AQI
30AQI
35AQI
33AQI
2025 Days Vs Air Quality
Nishikimachi, Tsuruoka, Yamagata, Japan
91%
252
9%
24
Total number of days with different AQI categories in last 277 days in 2025 (88 days remaining)
Under WHO’s Safe Air Quality Limits: 91%
Health Risk Level:
Very Low
In 2025, 91% of 277 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
Nishikimachi, Tsuruoka, Yamagata, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
31AQI
29AQI
29AQI
31AQI
29AQI
25AQI
31AQI
28AQI
28AQI
29AQI
27AQI
26AQI
28AQI
34AQI
29AQI
29AQI
27AQI
29AQI
30AQI
35AQI
37AQI
33AQI
34AQI
36AQI
28AQI
29AQI
25AQI
29AQI
29AQI
31AQI
32AQI
31AQI
28AQI
29AQI
31AQI
30AQI
32AQI
32AQI
31AQI
31AQI
32AQI
33AQI
31AQI
34AQI
32AQI
31AQI
33AQI
45AQI
31AQI
37AQI
31AQI
33AQI
32AQI
33AQI
32AQI
35AQI
44AQI
36AQI
51AQI
46AQI
54AQI
38AQI
40AQI
30AQI
32AQI
33AQI
33AQI
33AQI
37AQI
38AQI
37AQI
48AQI
35AQI
37AQI
22AQI
23AQI
24AQI
21AQI
30AQI
48AQI
54AQI
37AQI
43AQI
58AQI
46AQI
54AQI
42AQI
31AQI
28AQI
28AQI
24AQI
20AQI
21AQI
20AQI
25AQI
26AQI
24AQI
31AQI
25AQI
31AQI
35AQI
37AQI
25AQI
22AQI
19AQI
26AQI
35AQI
42AQI
53AQI
39AQI
35AQI
31AQI
32AQI
23AQI
26AQI
44AQI
38AQI
43AQI
29AQI
25AQI
25AQI
23AQI
30AQI
29AQI
29AQI
27AQI
26AQI
28AQI
32AQI
24AQI
29AQI
26AQI
41AQI
35AQI
44AQI
48AQI
36AQI
45AQI
36AQI
51AQI
52AQI
43AQI
41AQI
37AQI
27AQI
30AQI
28AQI
33AQI
32AQI
34AQI
23AQI
25AQI
34AQI
38AQI
35AQI
35AQI
35AQI
48AQI
52AQI
53AQI
51AQI
49AQI
41AQI
37AQI
39AQI
27AQI
29AQI
34AQI
38AQI
44AQI
48AQI
51AQI
61AQI
48AQI
44AQI
47AQI
39AQI
52AQI
39AQI
42AQI
48AQI
51AQI
55AQI
61AQI
66AQI
62AQI
59AQI
59AQI
57AQI
53AQI
50AQI
45AQI
44AQI
47AQI
40AQI
40AQI
47AQI
42AQI
40AQI
44AQI
41AQI
40AQI
40AQI
41AQI
44AQI
43AQI
47AQI
46AQI
42AQI
40AQI
46AQI
43AQI
35AQI
35AQI
39AQI
47AQI
42AQI
38AQI
34AQI
34AQI
33AQI
36AQI
29AQI
30AQI
30AQI
31AQI
31AQI
30AQI
35AQI
36AQI
44AQI
49AQI
46AQI
44AQI
47AQI
46AQI
45AQI
51AQI
38AQI
34AQI
40AQI
41AQI
40AQI
42AQI
37AQI
33AQI
34AQI
30AQI
27AQI
29AQI
28AQI
36AQI
30AQI
31AQI
34AQI
27AQI
29AQI
29AQI
33AQI
35AQI
29AQI
28AQI
28AQI
26AQI
26AQI
28AQI
29AQI
35AQI
45AQI
34AQI
30AQI
41AQI
48AQI
42AQI
41AQI
48AQI
30AQI
34AQI
37AQI
30AQI
34AQI
42AQI
48AQI
38AQI
32AQI
44AQI
No. of days
202536AQI
Highest AQI recorded in
July48AQI
Lowest AQI recorded in
January30AQI
202436AQI
Highest AQI recorded in
June46AQI
Lowest AQI recorded in
December28AQI
202339AQI
Highest AQI recorded in
July49AQI
Lowest AQI recorded in
October30AQI
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
Nishikimachi's annual 2025 AQI (36) shows an average percentage change of 3.1% (worsened AQI) compared to previous years: 2020 (31), 2021 (34), 2022 (36), 2023 (39), 2024 (36).