Chiang Khong, Chiang Rai, Thailand 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
Chiang Khong, Chiang Rai, Thailand
AQI Trends: Highest and Lowest
Same Day Analysis (16th September ):
On this day, AQI across the 2 years varied significantly: 2025 ranks 1st highest AQI at 45 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 17th Sep - 18th Sep 2025
Chiang Khong, Chiang Rai, Thailand
6 AM17th Sep 2025
6 PM
5 AM18th Sep 2025
AQI
AQI
62AQI
32AQI
In the last 24 hours,
Chiang Khong's AQI reached its highest point of 62 at 9 PM during the Night, while the lowest point, undefined, was recorded at 5 AM during the Night between 17th Sep and 18th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Chiang Khong, Chiang Rai, Thailand
26°C22/32°C
25°C22/31°C
26°C22/33°C
23°C21/27°C
23°C21/27°C
26°C22/32°C
27°C21/36°C
22°C21/28°C
22°C21/23°C
23°C21/25°C
24°C20/32°C
25°C20/34°C
25°C21/33°C
25°C21/30°C
25°C21/33°C
26°C22/34°C
27°C21/35°C
27°C21/36°C
27°C22/35°C
25°C21/34°C
26°C20/35°C
26°C20/33°C
25°C22/29°C
24°C21/29°C
24°C22/29°C
24°C21/31°C
25°C20/32°C
26°C20/34°C
24°C20/31°C
--°C/°C
--°C/°C
53AQI
39AQI
53AQI
51AQI
2025 Days Vs Air Quality
Chiang Khong, Chiang Rai, Thailand
35%
90
35%
91
27%
70
3%
8
Total number of days with different AQI categories in last 260 days in 2025 (105 days remaining)
Under WHO’s Safe Air Quality Limits: 35%
Health Risk Level:
High
In 2025, 35% of 260 days were within WHO’s safe air quality limits. The risk of health issues is High, with respiratory problems, heart disease, skin issues, and stress being more common, particularly among children and the elderly.
Annual Air Quality Insights
Chiang Khong, Chiang Rai, Thailand
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
89AQI
87AQI
81AQI
89AQI
99AQI
114AQI
116AQI
113AQI
122AQI
112AQI
104AQI
94AQI
96AQI
101AQI
112AQI
101AQI
98AQI
101AQI
101AQI
108AQI
116AQI
120AQI
121AQI
116AQI
107AQI
109AQI
79AQI
85AQI
98AQI
113AQI
109AQI
104AQI
110AQI
111AQI
114AQI
114AQI
115AQI
110AQI
104AQI
87AQI
100AQI
111AQI
110AQI
111AQI
110AQI
104AQI
131AQI
129AQI
130AQI
118AQI
116AQI
110AQI
107AQI
99AQI
79AQI
68AQI
61AQI
68AQI
75AQI
76AQI
84AQI
95AQI
109AQI
119AQI
126AQI
113AQI
105AQI
102AQI
98AQI
106AQI
116AQI
103AQI
114AQI
130AQI
123AQI
134AQI
118AQI
83AQI
92AQI
110AQI
134AQI
139AQI
151AQI
156AQI
156AQI
157AQI
164AQI
163AQI
163AQI
157AQI
147AQI
144AQI
145AQI
148AQI
145AQI
134AQI
107AQI
104AQI
124AQI
124AQI
120AQI
91AQI
74AQI
63AQI
59AQI
57AQI
55AQI
56AQI
59AQI
58AQI
63AQI
79AQI
83AQI
91AQI
103AQI
99AQI
100AQI
77AQI
73AQI
73AQI
66AQI
62AQI
61AQI
64AQI
69AQI
79AQI
94AQI
95AQI
79AQI
101AQI
98AQI
55AQI
61AQI
60AQI
42AQI
44AQI
47AQI
42AQI
42AQI
48AQI
53AQI
51AQI
66AQI
36AQI
34AQI
36AQI
40AQI
37AQI
43AQI
40AQI
36AQI
49AQI
43AQI
50AQI
57AQI
61AQI
62AQI
68AQI
66AQI
67AQI
61AQI
57AQI
57AQI
51AQI
54AQI
38AQI
37AQI
39AQI
35AQI
40AQI
42AQI
48AQI
58AQI
46AQI
39AQI
44AQI
43AQI
32AQI
44AQI
45AQI
44AQI
39AQI
40AQI
55AQI
46AQI
41AQI
42AQI
40AQI
46AQI
52AQI
50AQI
46AQI
44AQI
43AQI
47AQI
43AQI
46AQI
46AQI
44AQI
41AQI
40AQI
45AQI
42AQI
43AQI
37AQI
37AQI
40AQI
37AQI
38AQI
39AQI
43AQI
54AQI
56AQI
54AQI
54AQI
56AQI
54AQI
48AQI
45AQI
35AQI
37AQI
35AQI
41AQI
48AQI
51AQI
54AQI
50AQI
48AQI
48AQI
52AQI
49AQI
53AQI
51AQI
52AQI
48AQI
47AQI
51AQI
48AQI
47AQI
47AQI
49AQI
48AQI
47AQI
51AQI
49AQI
52AQI
47AQI
50AQI
50AQI
53AQI
55AQI
50AQI
46AQI
45AQI
51AQI
50AQI
47AQI
49AQI
45AQI
104AQI
104AQI
122AQI
95AQI
57AQI
49AQI
43AQI
48AQI
49AQI
No. of days
202576AQI
Highest AQI recorded in
March122AQI
Lowest AQI recorded in
July43AQI
202475AQI
Highest AQI recorded in
March161AQI
Lowest AQI recorded in
July34AQI
2023128AQI
Highest AQI recorded in
April216AQI
Lowest AQI recorded in
July36AQI
202284AQI
Highest AQI recorded in
December99AQI
Lowest AQI recorded in
November72AQI
Most & Least Polluted Years Over the Last 4 Years
Chiang Khong's annual 2025 AQI (76) shows an average percentage change of -16.2% (improved AQI) compared to previous years: 2022 (84), 2023 (128), 2024 (75).