Yokomachi, Itoigawa, Niigata, Japan Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
July Air Quality Analysis
Yokomachi, Itoigawa, Niigata, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (1st July ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 54 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 2nd Jul - 3rd Jul 2025
Yokomachi, Itoigawa, Niigata, Japan
4 AM2nd Jul 2025
7 PM
3 AM3rd Jul 2025
82AQI
51AQI
54AQI
52AQI
In the last 24 hours,
Yokomachi's AQI reached its highest point of 82 at 11 AM during the Day, while the lowest point, 51, was recorded at 4 AM during the Day between 2nd Jul and 3rd Jul 2025.
Day & Night AQI Trend : Jun - Jul 2025
Yokomachi, Itoigawa, Niigata, Japan
17°C16/17°C
19°C15/24°C
19°C14/24°C
21°C15/27°C
23°C17/28°C
22°C18/26°C
22°C18/26°C
19°C17/23°C
19°C17/21°C
18°C14/21°C
18°C13/22°C
19°C17/21°C
21°C18/24°C
23°C18/27°C
23°C20/26°C
23°C19/27°C
22°C19/26°C
23°C19/27°C
25°C20/29°C
24°C19/29°C
20°C18/22°C
21°C19/25°C
22°C20/25°C
21°C19/24°C
22°C19/24°C
22°C18/26°C
22°C18/27°C
24°C20/28°C
25°C21/28°C
24°C21/28°C
0°C0/0°C
48AQI
48AQI
49AQI
49AQI
2025 Days Vs Air Quality
Yokomachi, Itoigawa, Niigata, Japan
86%
156
14%
26
Total number of days with different AQI categories in last 184 days in 2025 (181 days remaining)
Under WHO’s Safe Air Quality Limits: 86%
Health Risk Level:
Low
In 2025, 86% of 184 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
Yokomachi, Itoigawa, Niigata, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
31AQI
29AQI
27AQI
27AQI
26AQI
30AQI
29AQI
29AQI
30AQI
28AQI
28AQI
27AQI
30AQI
35AQI
28AQI
27AQI
28AQI
28AQI
30AQI
33AQI
40AQI
35AQI
46AQI
39AQI
38AQI
31AQI
28AQI
30AQI
29AQI
31AQI
32AQI
35AQI
31AQI
33AQI
32AQI
31AQI
31AQI
35AQI
31AQI
31AQI
30AQI
32AQI
30AQI
35AQI
33AQI
32AQI
35AQI
40AQI
32AQI
33AQI
31AQI
32AQI
34AQI
33AQI
32AQI
34AQI
44AQI
50AQI
47AQI
49AQI
48AQI
40AQI
38AQI
30AQI
33AQI
36AQI
36AQI
35AQI
40AQI
37AQI
34AQI
50AQI
38AQI
37AQI
28AQI
28AQI
30AQI
23AQI
34AQI
50AQI
51AQI
66AQI
63AQI
75AQI
69AQI
70AQI
57AQI
44AQI
36AQI
36AQI
31AQI
29AQI
23AQI
22AQI
31AQI
27AQI
34AQI
38AQI
30AQI
38AQI
44AQI
42AQI
32AQI
34AQI
25AQI
38AQI
43AQI
52AQI
58AQI
48AQI
42AQI
45AQI
35AQI
26AQI
39AQI
48AQI
48AQI
47AQI
46AQI
49AQI
54AQI
36AQI
40AQI
36AQI
38AQI
35AQI
29AQI
30AQI
36AQI
28AQI
28AQI
39AQI
48AQI
51AQI
55AQI
56AQI
42AQI
52AQI
47AQI
63AQI
64AQI
47AQI
48AQI
47AQI
34AQI
33AQI
36AQI
35AQI
39AQI
35AQI
28AQI
32AQI
40AQI
43AQI
40AQI
42AQI
47AQI
52AQI
56AQI
60AQI
62AQI
47AQI
48AQI
41AQI
41AQI
30AQI
36AQI
39AQI
45AQI
50AQI
55AQI
60AQI
69AQI
48AQI
46AQI
48AQI
41AQI
56AQI
43AQI
43AQI
53AQI
54AQI
31AQI
34AQI
43AQI
38AQI
42AQI
47AQI
54AQI
No. of days
202539AQI
Highest AQI recorded in
July54AQI
Lowest AQI recorded in
January31AQI
202437AQI
Highest AQI recorded in
April51AQI
Lowest AQI recorded in
December27AQI
202338AQI
Highest AQI recorded in
April48AQI
Lowest AQI recorded in
January30AQI
202237AQI
Highest AQI recorded in
May47AQI
Lowest AQI recorded in
December27AQI
202134AQI
Highest AQI recorded in
June49AQI
Lowest AQI recorded in
January24AQI
202030AQI
Highest AQI recorded in
August55AQI
Lowest AQI recorded in
December19AQI
Most & Least Polluted Years Over the Last 6 Years
Yokomachi's annual 2025 AQI (39) shows an average percentage change of 12.4% (worsened AQI) compared to previous years: 2020 (30), 2021 (34), 2022 (37), 2023 (38), 2024 (37).