Den Chai District, Phrae, 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
Den Chai District, Phrae, Thailand
AQI Trends: Highest and Lowest
Same Day Analysis (24th September ):
On this day, AQI across the 2 years varied significantly: 2025 ranks 1st highest AQI at 21 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 25th Sep - 26th Sep 2025
Den Chai District, Phrae, Thailand
6 AM25th Sep 2025
6 PM
5 AM26th Sep 2025
AQI
AQI
44AQI
9AQI
In the last 24 hours,
Den Chai District's AQI reached its highest point of 44 at 7 AM during the Night, while the lowest point, undefined, was recorded at 5 AM during the Night between 25th Sep and 26th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Den Chai District, Phrae, Thailand
23°C22/24°C
23°C21/26°C
24°C20/29°C
24°C20/29°C
23°C20/26°C
24°C20/29°C
25°C23/30°C
24°C21/28°C
26°C23/32°C
26°C21/32°C
26°C22/31°C
25°C21/29°C
25°C20/30°C
24°C21/29°C
23°C21/27°C
25°C23/28°C
25°C22/30°C
26°C22/31°C
25°C22/30°C
25°C20/31°C
25°C23/28°C
26°C23/30°C
26°C21/32°C
26°C23/30°C
25°C23/28°C
26°C22/30°C
25°C23/28°C
24°C21/28°C
23°C20/29°C
--°C/°C
--°C/°C
50AQI
37AQI
50AQI
45AQI
2025 Days Vs Air Quality
Den Chai District, Phrae, Thailand
20%
53
57%
153
20%
53
3%
8
Total number of days with different AQI categories in last 268 days in 2025 (97 days remaining)
Under WHO’s Safe Air Quality Limits: 20%
Health Risk Level:
Very high
In 2025, 20% of 268 days were within WHO’s safe air quality limits. The risk of health issues is Very high, including respiratory issues, heart disease, and stress, particularly affecting vulnerable groups.
Annual Air Quality Insights
Den Chai District, Phrae, Thailand
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
83AQI
79AQI
77AQI
84AQI
96AQI
103AQI
108AQI
112AQI
120AQI
96AQI
90AQI
90AQI
93AQI
96AQI
96AQI
89AQI
88AQI
92AQI
99AQI
105AQI
116AQI
121AQI
123AQI
121AQI
109AQI
107AQI
83AQI
82AQI
100AQI
110AQI
105AQI
103AQI
100AQI
113AQI
116AQI
112AQI
116AQI
117AQI
113AQI
92AQI
98AQI
109AQI
114AQI
122AQI
122AQI
115AQI
141AQI
143AQI
140AQI
114AQI
112AQI
105AQI
98AQI
91AQI
74AQI
64AQI
54AQI
64AQI
70AQI
75AQI
80AQI
98AQI
115AQI
135AQI
132AQI
135AQI
104AQI
98AQI
86AQI
105AQI
111AQI
101AQI
100AQI
127AQI
123AQI
130AQI
120AQI
99AQI
96AQI
126AQI
150AQI
157AQI
162AQI
161AQI
157AQI
158AQI
160AQI
155AQI
157AQI
138AQI
124AQI
118AQI
131AQI
126AQI
114AQI
100AQI
90AQI
86AQI
98AQI
104AQI
99AQI
76AQI
62AQI
56AQI
56AQI
55AQI
55AQI
53AQI
56AQI
59AQI
66AQI
73AQI
85AQI
94AQI
102AQI
100AQI
88AQI
74AQI
69AQI
67AQI
62AQI
67AQI
64AQI
70AQI
71AQI
69AQI
68AQI
67AQI
67AQI
64AQI
60AQI
51AQI
60AQI
65AQI
60AQI
62AQI
68AQI
56AQI
58AQI
60AQI
57AQI
58AQI
56AQI
52AQI
51AQI
48AQI
50AQI
45AQI
50AQI
50AQI
50AQI
52AQI
53AQI
55AQI
61AQI
62AQI
62AQI
63AQI
59AQI
59AQI
59AQI
54AQI
56AQI
58AQI
55AQI
53AQI
52AQI
52AQI
49AQI
48AQI
49AQI
51AQI
51AQI
49AQI
51AQI
51AQI
53AQI
51AQI
51AQI
53AQI
54AQI
55AQI
55AQI
56AQI
53AQI
55AQI
52AQI
51AQI
53AQI
55AQI
56AQI
56AQI
53AQI
53AQI
53AQI
52AQI
50AQI
47AQI
45AQI
45AQI
45AQI
47AQI
49AQI
42AQI
44AQI
48AQI
51AQI
48AQI
49AQI
48AQI
52AQI
56AQI
58AQI
56AQI
56AQI
57AQI
54AQI
50AQI
43AQI
41AQI
36AQI
31AQI
37AQI
48AQI
48AQI
49AQI
46AQI
47AQI
47AQI
52AQI
50AQI
53AQI
56AQI
56AQI
51AQI
51AQI
55AQI
48AQI
49AQI
51AQI
52AQI
52AQI
51AQI
52AQI
52AQI
57AQI
44AQI
54AQI
54AQI
57AQI
53AQI
51AQI
46AQI
47AQI
50AQI
50AQI
48AQI
51AQI
44AQI
49AQI
46AQI
40AQI
33AQI
31AQI
26AQI
23AQI
21AQI
99AQI
105AQI
124AQI
85AQI
59AQI
54AQI
51AQI
49AQI
45AQI
No. of days
202575AQI
Highest AQI recorded in
March124AQI
Lowest AQI recorded in
September45AQI
202466AQI
Highest AQI recorded in
March124AQI
Lowest AQI recorded in
September11AQI
2023105AQI
Highest AQI recorded in
March176AQI
Lowest AQI recorded in
July25AQI
202286AQI
Highest AQI recorded in
December113AQI
Lowest AQI recorded in
November72AQI
Most & Least Polluted Years Over the Last 4 Years
Den Chai District's annual 2025 AQI (75) shows an average percentage change of -9.01% (improved AQI) compared to previous years: 2022 (86), 2023 (105), 2024 (66).