Izu, Shizuoka, 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
Izu, Shizuoka, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (29th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 36 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: 30th Sep - 1st Oct 2025
Izu, Shizuoka, Japan
5 AM30th Sep 2025
5 PM
4 AM1st Oct 2025
AQI
AQI
50AQI
13AQI
In the last 24 hours,
Izu's AQI reached its highest point of 50 at 6 PM during the Night, while the lowest point, 13, was recorded at 12 PM during the Night between 30th Sep and 1st Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Izu, Shizuoka, Japan
27°C23/31°C
27°C24/31°C
27°C23/31°C
24°C22/25°C
23°C19/26°C
24°C19/27°C
25°C21/28°C
26°C22/30°C
26°C23/30°C
26°C23/29°C
25°C22/29°C
23°C21/27°C
24°C22/28°C
26°C24/30°C
26°C24/28°C
26°C23/29°C
26°C22/30°C
26°C20/31°C
22°C21/24°C
22°C21/23°C
24°C21/29°C
22°C19/24°C
21°C17/24°C
20°C17/24°C
21°C17/25°C
23°C20/28°C
22°C20/25°C
23°C21/26°C
23°C19/28°C
--°C/°C
--°C/°C
36AQI
28AQI
35AQI
32AQI
2025 Days Vs Air Quality
Izu, Shizuoka, Japan
89%
242
11%
29
0.3%
1
Total number of days with different AQI categories in last 273 days in 2025 (92 days remaining)
Under WHO’s Safe Air Quality Limits: 89%
Health Risk Level:
Low
In 2025, 89% of 273 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
Izu, Shizuoka, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
27AQI
32AQI
28AQI
26AQI
27AQI
32AQI
30AQI
30AQI
30AQI
25AQI
27AQI
27AQI
27AQI
31AQI
37AQI
24AQI
28AQI
27AQI
34AQI
30AQI
37AQI
33AQI
46AQI
49AQI
39AQI
36AQI
28AQI
33AQI
32AQI
31AQI
31AQI
33AQI
29AQI
31AQI
31AQI
32AQI
32AQI
33AQI
30AQI
29AQI
29AQI
30AQI
30AQI
32AQI
30AQI
31AQI
36AQI
36AQI
31AQI
30AQI
29AQI
30AQI
30AQI
31AQI
31AQI
35AQI
37AQI
38AQI
42AQI
50AQI
52AQI
41AQI
38AQI
28AQI
28AQI
30AQI
30AQI
34AQI
35AQI
32AQI
27AQI
36AQI
35AQI
29AQI
22AQI
19AQI
18AQI
16AQI
24AQI
45AQI
47AQI
62AQI
59AQI
69AQI
112AQI
71AQI
67AQI
39AQI
41AQI
31AQI
27AQI
23AQI
20AQI
21AQI
25AQI
25AQI
29AQI
35AQI
44AQI
44AQI
43AQI
48AQI
24AQI
46AQI
23AQI
39AQI
45AQI
55AQI
62AQI
44AQI
46AQI
41AQI
29AQI
32AQI
36AQI
43AQI
43AQI
39AQI
36AQI
42AQI
39AQI
29AQI
32AQI
39AQI
32AQI
23AQI
26AQI
27AQI
29AQI
21AQI
26AQI
26AQI
32AQI
38AQI
36AQI
42AQI
28AQI
47AQI
44AQI
62AQI
39AQI
33AQI
35AQI
37AQI
22AQI
25AQI
22AQI
31AQI
29AQI
20AQI
17AQI
20AQI
29AQI
26AQI
30AQI
40AQI
42AQI
51AQI
61AQI
40AQI
26AQI
21AQI
35AQI
34AQI
33AQI
38AQI
43AQI
49AQI
51AQI
50AQI
40AQI
35AQI
27AQI
25AQI
24AQI
21AQI
20AQI
31AQI
32AQI
32AQI
38AQI
39AQI
41AQI
38AQI
42AQI
53AQI
62AQI
71AQI
77AQI
76AQI
56AQI
52AQI
54AQI
51AQI
44AQI
43AQI
45AQI
45AQI
42AQI
37AQI
35AQI
32AQI
30AQI
29AQI
27AQI
24AQI
23AQI
22AQI
23AQI
27AQI
26AQI
29AQI
35AQI
40AQI
44AQI
61AQI
49AQI
50AQI
48AQI
47AQI
49AQI
43AQI
39AQI
36AQI
34AQI
34AQI
35AQI
35AQI
38AQI
41AQI
43AQI
44AQI
45AQI
45AQI
45AQI
54AQI
56AQI
53AQI
52AQI
48AQI
51AQI
55AQI
52AQI
43AQI
33AQI
35AQI
32AQI
27AQI
25AQI
29AQI
33AQI
37AQI
33AQI
27AQI
28AQI
26AQI
30AQI
38AQI
47AQI
49AQI
50AQI
33AQI
34AQI
30AQI
29AQI
29AQI
28AQI
37AQI
50AQI
34AQI
27AQI
36AQI
31AQI
32AQI
41AQI
37AQI
32AQI
35AQI
42AQI
45AQI
34AQI
No. of days
202537AQI
Highest AQI recorded in
August45AQI
Lowest AQI recorded in
January31AQI
202434AQI
Highest AQI recorded in
July45AQI
Lowest AQI recorded in
September27AQI
202333AQI
Highest AQI recorded in
April41AQI
Lowest AQI recorded in
August26AQI
202231AQI
Highest AQI recorded in
March39AQI
Lowest AQI recorded in
August20AQI
202133AQI
Highest AQI recorded in
February39AQI
Lowest AQI recorded in
December28AQI
202033AQI
Highest AQI recorded in
November38AQI
Lowest AQI recorded in
September26AQI
Most & Least Polluted Years Over the Last 6 Years
Izu's annual 2025 AQI (37) shows an average percentage change of 11.2% (worsened AQI) compared to previous years: 2020 (33), 2021 (33), 2022 (31), 2023 (33), 2024 (34).