Funabashi, Honcho, Chiba, 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
Funabashi, Honcho, Chiba, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (22nd September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 34 of Good air quality, showing improvement over 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 22nd Sep - 23rd Sep 2025
Funabashi, Honcho, Chiba, Japan
5 AM22nd Sep 2025
5 PM
4 AM23rd Sep 2025
39AQI
20AQI
40AQI
18AQI
In the last 24 hours,
Funabashi's AQI reached its highest point of 40 at 1 AM during the Night, while the lowest point, 18, was recorded at 7 PM during the Night between 22nd Sep and 23rd Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Funabashi, Honcho, Chiba, Japan
30°C27/34°C
30°C27/35°C
29°C27/32°C
29°C27/32°C
29°C25/32°C
28°C26/31°C
30°C27/36°C
31°C28/36°C
29°C27/32°C
29°C27/32°C
30°C28/34°C
26°C25/27°C
25°C23/26°C
27°C23/31°C
27°C25/30°C
29°C26/34°C
29°C26/32°C
28°C27/31°C
27°C24/29°C
25°C23/28°C
27°C24/29°C
29°C27/31°C
28°C26/31°C
28°C26/31°C
29°C26/32°C
28°C23/33°C
22°C21/23°C
25°C22/27°C
26°C22/31°C
23°C21/26°C
--°C/°C
49AQI
43AQI
44AQI
41AQI
2025 Days Vs Air Quality
Funabashi, Honcho, Chiba, Japan
85%
226
15%
39
Total number of days with different AQI categories in last 266 days in 2025 (99 days remaining)
Under WHO’s Safe Air Quality Limits: 85%
Health Risk Level:
Low
In 2025, 85% of 266 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
Funabashi, Honcho, Chiba, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
33AQI
32AQI
25AQI
29AQI
36AQI
51AQI
33AQI
37AQI
31AQI
30AQI
31AQI
34AQI
30AQI
44AQI
40AQI
36AQI
33AQI
34AQI
51AQI
42AQI
42AQI
41AQI
53AQI
46AQI
42AQI
36AQI
41AQI
41AQI
34AQI
35AQI
30AQI
39AQI
31AQI
39AQI
31AQI
32AQI
27AQI
30AQI
28AQI
29AQI
27AQI
31AQI
33AQI
34AQI
29AQI
30AQI
36AQI
35AQI
32AQI
31AQI
29AQI
29AQI
30AQI
32AQI
32AQI
32AQI
37AQI
38AQI
56AQI
52AQI
68AQI
42AQI
41AQI
27AQI
34AQI
31AQI
34AQI
34AQI
34AQI
46AQI
48AQI
46AQI
43AQI
36AQI
26AQI
22AQI
24AQI
18AQI
23AQI
44AQI
50AQI
57AQI
54AQI
68AQI
79AQI
71AQI
54AQI
39AQI
40AQI
33AQI
29AQI
22AQI
20AQI
20AQI
24AQI
28AQI
30AQI
42AQI
26AQI
50AQI
38AQI
40AQI
30AQI
44AQI
32AQI
39AQI
48AQI
53AQI
62AQI
50AQI
46AQI
46AQI
32AQI
41AQI
38AQI
46AQI
48AQI
44AQI
37AQI
46AQI
40AQI
30AQI
34AQI
37AQI
37AQI
27AQI
25AQI
24AQI
30AQI
24AQI
30AQI
25AQI
35AQI
34AQI
38AQI
40AQI
30AQI
46AQI
40AQI
60AQI
43AQI
43AQI
39AQI
37AQI
29AQI
28AQI
25AQI
23AQI
28AQI
24AQI
17AQI
22AQI
31AQI
34AQI
34AQI
43AQI
48AQI
49AQI
57AQI
41AQI
35AQI
31AQI
43AQI
41AQI
35AQI
42AQI
43AQI
51AQI
46AQI
46AQI
42AQI
33AQI
21AQI
27AQI
27AQI
25AQI
26AQI
35AQI
32AQI
36AQI
39AQI
40AQI
42AQI
41AQI
45AQI
55AQI
69AQI
83AQI
80AQI
70AQI
54AQI
46AQI
49AQI
48AQI
41AQI
40AQI
40AQI
42AQI
37AQI
34AQI
31AQI
32AQI
32AQI
34AQI
35AQI
32AQI
31AQI
27AQI
34AQI
33AQI
29AQI
29AQI
30AQI
44AQI
45AQI
64AQI
57AQI
57AQI
52AQI
48AQI
50AQI
41AQI
42AQI
40AQI
38AQI
42AQI
40AQI
40AQI
43AQI
49AQI
48AQI
49AQI
56AQI
60AQI
50AQI
58AQI
59AQI
57AQI
53AQI
45AQI
54AQI
61AQI
58AQI
49AQI
41AQI
41AQI
40AQI
32AQI
36AQI
33AQI
51AQI
53AQI
50AQI
40AQI
35AQI
32AQI
40AQI
35AQI
38AQI
53AQI
46AQI
35AQI
40AQI
32AQI
34AQI
37AQI
33AQI
43AQI
38AQI
33AQI
37AQI
43AQI
49AQI
40AQI
No. of days
202539AQI
Highest AQI recorded in
August49AQI
Lowest AQI recorded in
February33AQI
202439AQI
Highest AQI recorded in
July54AQI
Lowest AQI recorded in
September33AQI
202341AQI
Highest AQI recorded in
April46AQI
Lowest AQI recorded in
August32AQI
202240AQI
Highest AQI recorded in
March45AQI
Lowest AQI recorded in
August33AQI
202138AQI
Highest AQI recorded in
December43AQI
Lowest AQI recorded in
October35AQI
202039AQI
Highest AQI recorded in
August47AQI
Lowest AQI recorded in
September31AQI
Most & Least Polluted Years Over the Last 6 Years
Funabashi's annual 2025 AQI (39) shows an average percentage change of -0.2% (improved AQI) compared to previous years: 2020 (39), 2021 (38), 2022 (40), 2023 (41), 2024 (39).