Tomihisamachi, Matsuyama, Ehime, 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
Tomihisamachi, Matsuyama, Ehime, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (16th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 39 of Good air quality, showing improvement over 2023 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 17th Sep - 18th Sep 2025
Tomihisamachi, Matsuyama, Ehime, Japan
5 AM17th Sep 2025
6 PM
4 AM18th Sep 2025
AQI
AQI
69AQI
31AQI
In the last 24 hours,
Tomihisamachi's AQI reached its highest point of 69 at 12 PM during the Night, while the lowest point, 31, was recorded at 7 PM during the Night between 17th Sep and 18th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Tomihisamachi, Matsuyama, Ehime, Japan
27°C25/30°C
27°C25/30°C
27°C24/31°C
27°C23/31°C
27°C25/30°C
28°C26/30°C
27°C25/30°C
27°C25/30°C
27°C24/30°C
27°C25/30°C
27°C25/30°C
27°C25/30°C
27°C25/30°C
28°C25/31°C
27°C24/31°C
27°C25/31°C
25°C24/26°C
27°C25/30°C
27°C25/29°C
27°C25/30°C
27°C25/30°C
27°C25/30°C
26°C25/29°C
25°C23/27°C
25°C23/28°C
26°C24/30°C
27°C25/30°C
27°C23/30°C
27°C24/29°C
--°C/°C
--°C/°C
39AQI
32AQI
39AQI
36AQI
2025 Days Vs Air Quality
Tomihisamachi, Matsuyama, Ehime, Japan
73%
190
26%
68
0.3%
1
Total number of days with different AQI categories in last 260 days in 2025 (105 days remaining)
Under WHO’s Safe Air Quality Limits: 73%
Health Risk Level:
Low
In 2025, 73% of 260 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
Tomihisamachi, Matsuyama, Ehime, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
35AQI
40AQI
36AQI
30AQI
28AQI
42AQI
30AQI
35AQI
28AQI
27AQI
29AQI
29AQI
40AQI
46AQI
42AQI
35AQI
36AQI
32AQI
40AQI
37AQI
49AQI
57AQI
59AQI
73AQI
44AQI
45AQI
34AQI
36AQI
30AQI
40AQI
50AQI
52AQI
39AQI
48AQI
35AQI
39AQI
31AQI
35AQI
31AQI
31AQI
30AQI
32AQI
38AQI
31AQI
34AQI
29AQI
37AQI
40AQI
34AQI
37AQI
31AQI
33AQI
37AQI
35AQI
37AQI
35AQI
43AQI
67AQI
75AQI
86AQI
68AQI
49AQI
43AQI
38AQI
38AQI
34AQI
39AQI
39AQI
42AQI
45AQI
47AQI
53AQI
46AQI
36AQI
26AQI
42AQI
31AQI
39AQI
47AQI
55AQI
61AQI
65AQI
59AQI
67AQI
68AQI
60AQI
57AQI
45AQI
40AQI
38AQI
41AQI
32AQI
28AQI
29AQI
39AQI
45AQI
42AQI
40AQI
53AQI
54AQI
56AQI
60AQI
47AQI
45AQI
32AQI
48AQI
48AQI
59AQI
56AQI
46AQI
47AQI
50AQI
37AQI
35AQI
56AQI
56AQI
54AQI
44AQI
43AQI
51AQI
46AQI
40AQI
45AQI
38AQI
42AQI
31AQI
34AQI
40AQI
36AQI
35AQI
37AQI
49AQI
53AQI
58AQI
64AQI
60AQI
48AQI
53AQI
59AQI
62AQI
60AQI
41AQI
53AQI
38AQI
29AQI
36AQI
40AQI
39AQI
48AQI
47AQI
41AQI
46AQI
52AQI
35AQI
46AQI
45AQI
52AQI
56AQI
60AQI
56AQI
39AQI
42AQI
50AQI
53AQI
42AQI
34AQI
36AQI
32AQI
42AQI
41AQI
47AQI
56AQI
66AQI
58AQI
55AQI
54AQI
51AQI
53AQI
56AQI
54AQI
56AQI
56AQI
73AQI
97AQI
101AQI
90AQI
75AQI
69AQI
69AQI
71AQI
79AQI
73AQI
65AQI
59AQI
50AQI
57AQI
59AQI
53AQI
42AQI
42AQI
41AQI
36AQI
34AQI
32AQI
37AQI
32AQI
29AQI
27AQI
34AQI
33AQI
32AQI
35AQI
44AQI
43AQI
46AQI
54AQI
48AQI
44AQI
47AQI
49AQI
39AQI
45AQI
34AQI
32AQI
40AQI
44AQI
43AQI
40AQI
40AQI
44AQI
50AQI
46AQI
43AQI
43AQI
45AQI
42AQI
44AQI
46AQI
47AQI
45AQI
50AQI
47AQI
45AQI
38AQI
33AQI
38AQI
27AQI
22AQI
27AQI
30AQI
30AQI
30AQI
32AQI
30AQI
28AQI
33AQI
29AQI
34AQI
39AQI
39AQI
38AQI
48AQI
46AQI
45AQI
49AQI
54AQI
44AQI
31AQI
No. of days
202545AQI
Highest AQI recorded in
July54AQI
Lowest AQI recorded in
September31AQI
202437AQI
Highest AQI recorded in
April47AQI
Lowest AQI recorded in
December31AQI
202338AQI
Highest AQI recorded in
April48AQI
Lowest AQI recorded in
August28AQI
202243AQI
Highest AQI recorded in
March55AQI
Lowest AQI recorded in
December33AQI
202149AQI
Highest AQI recorded in
June61AQI
Lowest AQI recorded in
August42AQI
202049AQI
Highest AQI recorded in
August66AQI
Lowest AQI recorded in
July42AQI
Most & Least Polluted Years Over the Last 6 Years
Tomihisamachi's annual 2025 AQI (45) shows an average percentage change of 4.7% (worsened AQI) compared to previous years: 2020 (49), 2021 (49), 2022 (43), 2023 (38), 2024 (37).