Uji, Kyoto, 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
Uji, Kyoto, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (18th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 43 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 18th Sep - 19th Sep 2025
Uji, Kyoto, Japan
5 AM18th Sep 2025
6 PM
4 AM19th Sep 2025
56AQI
17AQI
51AQI
15AQI
In the last 24 hours,
Uji's AQI reached its highest point of 56 at 9 AM during the Day, while the lowest point, 15, was recorded at 7 PM during the Night between 18th Sep and 19th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Uji, Kyoto, Japan
30°C25/35°C
30°C25/35°C
30°C26/34°C
30°C26/34°C
30°C27/34°C
29°C26/35°C
29°C26/33°C
28°C25/33°C
28°C24/33°C
29°C26/34°C
30°C26/36°C
31°C26/37°C
30°C27/35°C
30°C26/34°C
30°C26/35°C
25°C24/26°C
25°C24/28°C
27°C23/33°C
28°C24/32°C
28°C25/32°C
29°C25/33°C
28°C24/33°C
26°C23/29°C
26°C24/29°C
27°C24/30°C
28°C25/31°C
29°C25/33°C
29°C25/34°C
29°C26/32°C
26°C23/31°C
--°C/°C
44AQI
40AQI
41AQI
41AQI
2025 Days Vs Air Quality
Uji, Kyoto, Japan
72%
187
28%
74
Total number of days with different AQI categories in last 262 days in 2025 (103 days remaining)
Under WHO’s Safe Air Quality Limits: 72%
Health Risk Level:
Low
In 2025, 72% of 262 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
Uji, Kyoto, Japan
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
33AQI
42AQI
33AQI
33AQI
33AQI
41AQI
36AQI
33AQI
33AQI
27AQI
26AQI
39AQI
39AQI
54AQI
44AQI
42AQI
36AQI
35AQI
37AQI
45AQI
40AQI
55AQI
67AQI
61AQI
45AQI
41AQI
43AQI
39AQI
35AQI
41AQI
82AQI
76AQI
49AQI
56AQI
42AQI
41AQI
35AQI
40AQI
30AQI
31AQI
32AQI
30AQI
40AQI
31AQI
40AQI
29AQI
50AQI
39AQI
38AQI
33AQI
29AQI
30AQI
31AQI
35AQI
33AQI
40AQI
42AQI
60AQI
61AQI
63AQI
81AQI
45AQI
44AQI
31AQI
38AQI
33AQI
41AQI
37AQI
41AQI
33AQI
33AQI
49AQI
42AQI
39AQI
23AQI
31AQI
29AQI
28AQI
44AQI
57AQI
62AQI
72AQI
75AQI
76AQI
91AQI
82AQI
50AQI
47AQI
34AQI
39AQI
31AQI
31AQI
23AQI
26AQI
41AQI
40AQI
49AQI
49AQI
49AQI
56AQI
53AQI
54AQI
32AQI
49AQI
26AQI
49AQI
49AQI
61AQI
62AQI
53AQI
43AQI
50AQI
26AQI
27AQI
66AQI
57AQI
63AQI
48AQI
57AQI
66AQI
58AQI
40AQI
50AQI
40AQI
45AQI
26AQI
31AQI
33AQI
36AQI
31AQI
36AQI
49AQI
55AQI
60AQI
55AQI
56AQI
43AQI
52AQI
55AQI
67AQI
48AQI
37AQI
54AQI
38AQI
28AQI
31AQI
30AQI
30AQI
39AQI
37AQI
38AQI
43AQI
51AQI
29AQI
48AQI
44AQI
47AQI
54AQI
65AQI
44AQI
30AQI
37AQI
42AQI
48AQI
32AQI
29AQI
42AQI
39AQI
50AQI
55AQI
58AQI
56AQI
54AQI
48AQI
39AQI
40AQI
39AQI
50AQI
46AQI
51AQI
56AQI
63AQI
81AQI
85AQI
95AQI
92AQI
81AQI
69AQI
75AQI
84AQI
64AQI
56AQI
56AQI
54AQI
43AQI
51AQI
54AQI
39AQI
43AQI
37AQI
34AQI
34AQI
38AQI
43AQI
38AQI
35AQI
30AQI
29AQI
32AQI
41AQI
44AQI
42AQI
45AQI
45AQI
48AQI
62AQI
52AQI
53AQI
49AQI
44AQI
48AQI
47AQI
37AQI
36AQI
39AQI
43AQI
43AQI
43AQI
43AQI
47AQI
47AQI
46AQI
48AQI
44AQI
50AQI
55AQI
56AQI
56AQI
54AQI
53AQI
56AQI
55AQI
54AQI
41AQI
34AQI
38AQI
26AQI
25AQI
28AQI
33AQI
36AQI
37AQI
34AQI
29AQI
30AQI
28AQI
35AQI
38AQI
46AQI
52AQI
43AQI
42AQI
40AQI
48AQI
46AQI
43AQI
46AQI
54AQI
48AQI
35AQI
No. of days
202545AQI
Highest AQI recorded in
July54AQI
Lowest AQI recorded in
September35AQI
202438AQI
Highest AQI recorded in
April49AQI
Lowest AQI recorded in
October33AQI
202342AQI
Highest AQI recorded in
April51AQI
Lowest AQI recorded in
August32AQI
202243AQI
Highest AQI recorded in
May52AQI
Lowest AQI recorded in
October35AQI
202141AQI
Highest AQI recorded in
March47AQI
Lowest AQI recorded in
August35AQI
202041AQI
Highest AQI recorded in
August57AQI
Lowest AQI recorded in
October36AQI
Most & Least Polluted Years Over the Last 6 Years
Uji's annual 2025 AQI (45) shows an average percentage change of 9.9% (worsened AQI) compared to previous years: 2020 (41), 2021 (41), 2022 (43), 2023 (42), 2024 (38).